Please verify to see if I'm correct for the following problems:
1) Solve: 9x^2 = 14
My answer is : +-sqrt14/9
Solve: 5(x – 2)^2 = 3
2) My answer is: 10 +- sqrt15/5
and the last one I couldnt come up with an answer:
–9(x – 3)^2 = –7
2006-11-17 00:07:42 · 2 answers · asked by Anonymous in Education & Reference ➔ Homework Help
First one : - ...Correct! Congratulations!
Second one : - ...hmm could be wrong
(x - 2)^2 = 3/5
x - 2 =+-sqrt3/5
x = 2 +- sqrt3/5
Third one : - hey there is no harm in trying!
(x - 3)^2 = 2
x - 3 = +-sqrt2
x = 3 +-sqrt2
Best of luck!!
2006-11-17 01:25:01 · answer #1 · answered by Naval Architect 5 · 0⤊ 0⤋
The first one looks correct to me.
For the second and third ones, remember -- the exponent comes first in the order of operations (after anything in parens). You have to simplify those equations and then use the quadratic equation to find x. For example, number 2 would be...
5x^2 - 20x + 20 = 3
Then you must put it in the form for solving a quadratic equation...
5x^2 -20x + 17 = 0
2006-11-17 08:19:10 · answer #2 · answered by Anonymous · 0⤊ 0⤋