x^2+6x+5=0
(x+1)(x+5)
x+1=0
(subtract one from both sides to get: x= -1)
x+5=0
(subtract five from both sides to get x= -5)
2007-01-09 11:10:06
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answer #1
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answered by Anonymous
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You have to factor this equation.
(x + 5) (x + 1) = 0
There are two solutions.
x= -5
x = -1
Substitute into the original formula
x^2 + 6x + 5= 0
-5^2 + (6*-5) + 5 = 0
25 - 30 + 5 = 0
0 = 0 (checks)
Substitute into the original formula
x^2 + 6x + 5= 0
-1^2 + (6*-1) + 5 = 0
1 - 6 + 5 = 0
-5 + 5 = 0
0 = 0 (Checks)
2007-01-09 19:11:32
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answer #2
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answered by The Answer Man 5
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you just have to look and factor it.
(x+5)(x+1) = 0 so
x + 5 = 0 so x = -5
x + 1 = 0 so x = -1
The key in "looking" is deciding what two numbers multiply
together to equal +5. In this problem you could only choose from
(+5) times (+ 1) = 5
or
(-5) times (-1) = 5
pick the pair that will add up to the coefficient on the x (the 6 in 6x)
(+1) + (+5) = 6
2007-01-09 19:18:49
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answer #3
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answered by CAM1122 3
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Simplifying
x2 + 6x + 5 = 0
Reorder the terms:
5 + 6x + x2 = 0
Solving
5 + 6x + x2 = 0
Solving for variable 'x'.
Factor a trinomial.
(5 + x)(1 + x) = 0
Subproblem 1
Set the factor '(5 + x)' equal to zero and attempt to solve:
Simplifying
5 + x = 0
Solving
5 + x = 0
Move all terms containing x to the left, all other terms to the right.
Add '-5' to each side of the equation.
5 + -5 + x = 0 + -5
Combine like terms: 5 + -5 = 0
0 + x = 0 + -5
x = 0 + -5
Combine like terms: 0 + -5 = -5
x = -5
Simplifying
x = -5
Subproblem 2
Set the factor '(1 + x)' equal to zero and attempt to solve:
Simplifying
1 + x = 0
Solving
1 + x = 0
Move all terms containing x to the left, all other terms to the right.
Add '-1' to each side of the equation.
1 + -1 + x = 0 + -1
Combine like terms: 1 + -1 = 0
0 + x = 0 + -1
x = 0 + -1
Combine like terms: 0 + -1 = -1
x = -1
Simplifying
x = -1
Solution
x = {-5, -1}
2007-01-09 19:11:06
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answer #4
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answered by Anonymous
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x= -1 and -5
(x+1)(x+5)
(x+1)(x+5) = x^2 + 5x + 1x + 5 = x^2 +6x + 5
You then have to make both numbers in the paranthesis equal zero, so: (x+1)(x+5) would be (-1 +1)(-5 +5) to be (0)(0). So the answer is x equals -1 and -5
2007-01-09 19:09:07
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answer #5
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answered by medone7 2
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x is equal to -1 or -5
you have to factor the equation into
(x+1)(x+5)=0
then just find what number makes each of the parenthese equal zero
-1+1=0, or -5+5=0
2007-01-09 19:14:10
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answer #6
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answered by chrismc30590 2
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u have to factor x-squared+6x+5 into
(x+1)(x+5)
so u get (x+1)(x+5)=0 and inorder for this to b tru x has to be negative 1 and negative 5
x= -1, -5
2007-01-09 19:12:51
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answer #7
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answered by Anonymous
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you need to factor
(x + 5)(x + 1)
Check: (* is multiplication)
[x * x = x^2]
[x*1 + 5 *x = 6x]
[5*1= 5]
set them each to the zero and solve
x +5 = 0
x = -5
x +1 = 0
x = -1
you have two answer x= -5 and x = -1
2007-01-09 19:12:07
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answer #8
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answered by Leah M 3
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x=-2 and x=-3 i dont feel like showing the work
2007-01-09 19:08:14
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answer #9
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answered by Anonymous
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it's a quadratic equation with the y-intercept (0, #) as 0,5
2007-01-09 19:09:36
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answer #10
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answered by the Politics of Pikachu 7
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