Factor these expressions. x^2 + 7x + 10 x^2 - 3x + 2 -x^2 + 3x + 40 9y^2 - 36 -x^2 + 5x - 4

Hello There!

(x + 2)(x + 5)
To check you can expand it:
x² + 2x + 5x + 10
= x² + 7x + 10
So we know it is correct.

(x - 2)(x - 1) 
To check you can expand it:
x² - 2x - x + 2
= x² - 3x +2
So we know it is correct

-(x + 5)(x - 8)
To check you can expand it:
-x² - 5x + 8x + 40
-x² + 3x + 40
So we know it is correct

9(y + 2)(y - 2)
To check you can expand it:
9y² - 36
So we know it is correct.

-(x - 1)(x - 4)
To check you can expand it:
-x² + 5x - 4.
So we know it is correct.

Hope This Helps You!
Good Luck :) 

- Hannah ❤