Question

Okay I want to know did I get this correct?
Directions: Factor each polynomial
The problem: m^2+7m-18
My Answer: m^2+9m-2m

Directions:Factor each polynomial
Problem: 2x^2-3x-5
My Answer: Couldnt get one

Answer 1

m^2+7m-18

- you need 2 numbers whose product is -18 and whose sum is + 7

the answer is of the form

(x + a)(x + b) where a and b are the 2 numbers

Answer 2

*m instead of x

Answer 3

think of some factors of -18 which will give you +7 when you add them

Answer 4

9 and -2?

Answer 5

right

Answer 6

so the factors are
(m + 9)(m - 2)

Answer 7

Yeah I got that...so my answer just wasnt correct?

Answer 8

your original answer was wrong

Answer 9

second one can be factored also:-

2x^2-3x-5

= 2x^2 -5x + 2x - 5
= x(2x - 5) + 1(2x - 5)
= (2x - 5)(x + 1)