Question

What are the solutions of 2x2 - 6x = -8? please help!

Answer 1

\[2x ^{2}-6x=-8\] This is the equation?

Answer 2

Yes

Answer 3

Quadratic equation. First you need to add eight to both sides of the equation which gives you what?

Answer 4

2x^2-6x+8=0?

Answer 5

Do you know the quadratic formula?

Answer 6

Yes but i forget what goes where could you tell me like which is
A, b and c?

Answer 7

Well lets see if we can do it with out the formula. What do we get if we divide both sides of the equation by 2?

Answer 8

x^2-3x+4=0

Answer 9

Good now we have to factor this out into (x+a)(x+b)= x^2-3x+4. Can you do this?

Answer 10

Solve for a and b.

Answer 11

http://ts1.mm.bing.net/th?&id=HN.608013394737893209&w=300&h=300&c=0&pid=1.9&rs=0&p=0

Answer 12

-2 and -2?

Answer 13

(x-2)(x-2) does this equal x^2-3x+4? Well x times x equals x^2 and -2 times -2 equals 4. But x times -2 = -2x and -2 times x = -2x leaving us with x^2 -2x-2x+4 or x^2-4x+4. What other factor of 4 can you use?

Answer 14

-3, -1

Answer 15

-3 times -1 does not equal 4.

Answer 16

oh my bad lol -4 -1

Answer 17

The original problem. All the numbers are correct?

Answer 18

All the negatives are where there suppose to be?

Answer 19

I believe so

Answer 20

Well my error you will have to solve with the quadratic formula.
http://ts4.mm.bing.net/th?id=HN.608016830722150363&w=238&h=179&c=7&rs=1&qlt=80&pid=1.7

Answer 21

Thank you