Question

Can someone please help me with guess and check factoring?

Answer 1

@Nnesha

Answer 2

@Nnesha ? I need your help

Answer 3

whats the problem

Answer 4

http://www.virtualnerd.com/algebra-2/quadratics/solve-equations-by-factoring/factoring-strategies/factor-by-guess-and-check

Answer 5

In my homework, I'm supposed to factor the expression x^2 + 8x - 9 using the guess and check method. I know that that means I have to find two numbers that add up make the second term and multiply to make the third term. But I can't think of any numbers that add up to 8 and multiply to -9. I don't know what to do now.

Answer 6

factors of 9 are 1 ,3 9
what two number would you multiply to get -9 but when u add/subtract them you should 8

Answer 7

guess and check so play with signs
one of the number suppose to be negative

Answer 8

Wait, in the guess and check method you can subtract also?

Answer 9

yes you can
you can add or subtract both numbers to get the middle term (b which is 8 in this equation )

Answer 10

Oh I got it! -1 and 9. -1 + 9 = 8, and -1 * 9 = -9

Answer 11

\(\huge\color{green}{\checkmark}\) right :=)

Answer 12

So the factors should be: (x - 1) (x + 9)
Correct?

Answer 13

right leading coefficient is one so you can write it as (x + (1st number)) (x+ (2nd number))
good job! :=)

Answer 14

Thanks Didi! :D

Answer 15

np :=) didi ;D