I am not looking for the solution for each. But I am looking for an explanation as to what the differences are in solving between these two problems. Thank you.
2006-12-10 08:51:49 · 6 answers · asked by hi :) 2 in Science & Mathematics ➔ Mathematics
sorry, thats 2/(a-3) + 6/a =7
2006-12-10 08:56:30 · update #1
reading his note that it's actually 2/(a-3) + 6/a =7
the first one is solved:
2a+6a-18=7a^2-21a
7a^2-29a+18=0
and solve using the quadratic formula or completing the square
but remember that a =/= 3 or 0
the second one is solved
2x=10
x=5
basically the differences are that the first one is a quadratic and it has possible false solutions. Always check your awnsers by plugging it into the equation. If not then just check the one's with logs, inverse varibles and square roots and other weird things.
2006-12-10 09:27:57 · answer #1 · answered by rawfulcopter adfl;kasdjfl;kasdjf 3 · 0⤊ 0⤋
1)
2/(a-3)+6/a
You are simplifying the equation so multiply it all by a. and you get:
2/-3 + 6
change 6 to 18/3.
-2/3 + 18/3
That would be simplifying
2)
2x-4=6
this would be finding the value of x.
So add 4 to both sides
2x=10
and then solve.
Simplifying is much different than solving for a value of a variable.
2006-12-10 08:57:30 · answer #2 · answered by nightshadyraytiprocshadow 2 · 0⤊ 0⤋
See till the challenge is nice written, the stairs will lead you off course. i wish your subject is, 2/(a+3) = 6/(a-3). if so basically circulate multiplication will show you how to fixing. i.e., 2(a-3) = 6(a+3) which solves to -4a =24 or a = -6. yet while the question is (2/a) +3 = (6/a) - 3 6 = 4/a, 6a =4, a =4/6 = 2/3. (via the via you're saying those are quadratic equations, how?)
2016-12-11 06:27:19 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Remember the order of performing mathematical problems.
1 Perform calculations enclosed in paranthese first from right to left as they appear in the calculation. Perform those calculations in the following order..
2. Perform multiplacations from right to left in the equation.
3. Perform division tasks from right to left in the equation.
4. Perform addition from right to left in the equation
5. Perform subtractions from right to left in the equations
When you look at an algebraic expression such as 2x 3x etc you must find the value of the variable x that will complete the expression In the example 2x-4=6 It can be read as 2 times what value less 4 is equal to 6 2x is an implied multiplication statement. I hope this helped
2006-12-10 09:10:24 · answer #4 · answered by sodaorpop 2 · 0⤊ 0⤋
"2/(a + 3) + 6/a" is not an equation (it is called an "expression"), therefore you can't "solve" it but you can simplify it.
"2x - 4 = 6" is an equation, and therefore it is solvable.
ANSWER: The difference is that one is solvable, but the other is only "simplifiable" (if that is a word).
2006-12-10 08:59:03 · answer #5 · answered by Anonymous · 0⤊ 0⤋
The first problem is not an equation. There is no equal sign, hence nothing to solve for. The second problem is an equation and can be solved.
2006-12-10 08:54:52 · answer #6 · answered by rscanner 6 · 0⤊ 0⤋