Question

Solve -2x^2 +3x - 9 = 0

Answer 1

@wio can you please help me?

Answer 2

@triciaal Please help me!

Answer 3

A. https://lss.brainhoney.com/Resource/22181721,AB4,0,B,0,0/Assets/71820_53b5a5b6/05_06c_3_05.gif

B. https://lss.brainhoney.com/Resource/22181721,AB4,0,B,0,0/Assets/71820_53b5a5b6/05_06c_3_06.gif

C. https://lss.brainhoney.com/Resource/22181721,AB4,0,B,0,0/Assets/71820_53b5a5b6/05_06c_3_07.gif

D. https://lss.brainhoney.com/Resource/22181721,AB4,0,B,0,0/Assets/71820_53b5a5b6/05_06c_3_08.gif

Answer 4

you have in general form ax^2 + bx + c =0
what is a*c ?
what are the factors of a*c that add up to b
also pay attention to the signs

Answer 5

ok so the answer is C right?

Answer 6

i did not have time to do it I was busy typing the steps to walk you through it so you can learn how to do it

Answer 7

i'm pretty sure it's C... i did the work on paper

Answer 8

so do you already know how to factor and only need me to check your answer?

Answer 9

why not just use the quadratic formula? If you want to just check it, why not just use a graphing calculator and verify the solution on the table or graph?

Answer 10

i don't know how to do that @precal :(

Answer 11

http://www.purplemath.com/modules/quadform.htm

Answer 12

@precal thank you! it turns out i was right :)

Answer 13

good job now remember we need quadratics for everything in the higher mathematics