Question

What are the roots of the quadratic equation x^2-2x+4=8x–21?
Can someone explain to me how to find this answer?

Answer 1

first get in the standard format ax^2 + bx + c = 0

Answer 2

identify your a,b,c

Answer 3

what is the product a times c

Answer 4

what are the factors of (ac) that add up to b ? pay attention to the signs

Answer 5

rewrite the original and split b into the 2 addends
you have 4 terms = 0

Answer 6

group into 2 groups with 2 terms each and factor
you will have a common factor in the 2 groups

Answer 7

any questions?

the alternate is to use the formula

where are you?

Answer 8

wait why did you delete that?

Answer 9

I need to do the problem to check if you are correct and know what you should get. This is actually a very easy one. in order for you to learn you need to do it.

Answer 10

so, are you following the directions?

Answer 11

yes and I tried to do it and I'm not sure if I'm on the right track. Am I supposed to get 25x^2-10x=0 at all when solving?

Answer 12

not 25x^2
show your work
what was your a, b, c

Answer 13

a. x^2
b. -10x
c. -25

Answer 14

I'm so confused

Answer 15

not -25 will be 25 you set = 0