(a) 16=√(x)+2
14 = √(x) [square both sides]
196 = x
(b)7=√(x)+2
5 = √(x)
25 = x
2007-10-23 13:19:07
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answer #1
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answered by ChemistryMom 5
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The recipe for doing maths, if you do not understand it, is to have the answer(if you can get it) and find out by yourself how they got to the answer.
a) 16=√(x) +2
16 - 2 = √(x)
14 = (√(x))²
196 = x or x = -196
Remember to test your answer: the square root of ±196 = 14 and 14 + 2 is 16, so there you go, I gave you a push in the right direction. Figure the next one out and remember that maths occur in steps, almost like having an equation where you first do (), then *, then /, then + and -.
So for this equation, first look at what is the same in the equation, 2 and 16 are constants, then look at what you can do to make the two different constants one, so you take them to the same side of the equation(+2 becomes -2). Then see that you have a square root, so you know that you will have a positive and negative answer, because (-2)² = 4 = (+2)². Then you just get x in its simplest form.
There you go, hope this helps.
2007-10-23 13:30:30
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answer #2
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answered by Anonymous
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Question a)
16 = √x + 2
√x = 14
x = 196
Question b)
7 = √x + 2
√x = 5
x = 25
2007-10-29 20:54:52
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answer #3
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answered by Como 7
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The square root of (x) + 2 should equal 16.
So that means you should do 16^2 ( sixteen squared )
So the square root of x + 2 = 256
get x by it self so x = 254
and do the same for the second problem.
7^2 = 49.
(x) + 2 should equal 49.
get x by itself.
x = 47
2007-10-23 13:22:13
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answer #4
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answered by Jankitty 2
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A = √ devided by (x) minus 2 and be is √ devided by x - 2
A= 16 - 2 = 14 = √(x)
Just to get you started
2007-10-23 13:21:54
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answer #5
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answered by Anonymous
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the first step is to distribute the 5 on the left fringe of the equation: 5b - 10 < 3b + 2 next, you subtract 3b from each and every part, and upload 10 to each and every part so that you've in simple terms b on one part and easily numbers on the different: 2b < 12 Divide by 2 on each and every part and also you've were given your answer: b < 6
2016-10-22 21:58:42
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answer #6
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answered by Anonymous
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You need to square both sides of each equation
so 16=√(x)+2
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14=√(x)
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(14)² = (√(x))²
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196 = x
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When you square both sides it cancels out the square root. Like multiplying both sides by negative 1 when -x=5 to make x=-5
2007-10-23 13:18:43
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answer #7
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answered by The Circular File 1
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Do your own homework man. Look in your book and it should be in there. If you still can't figure it out then go to the teacher. Asking us won't help you figure it out if we just give you the answer.
2007-10-23 13:17:12
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answer #8
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answered by Corey C 2
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square both sides to get rid of the radical....then solve.
2007-10-23 13:20:04
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answer #9
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answered by baron 2
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a)16=sqrt(x)+2
16-2=sqrt(x)
14^2=[sqrt(x)]^2
x=196
b)same process
7-2=sqrt(x)
5^2=[sqrt(x)]^2
x=25
2007-10-23 13:20:45
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answer #10
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answered by ben3na 1
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