Factoring

Mental Math

100

 (x + 4)(x – 3) = 0

x=-4 x=3

200

(x+5)(x+7)=0

x=-5 x=-7

300

x2 + 5x + 6

(x + 3)(x + 2)

400

3y+16y

19y

500

5x^2+15x

5x(x+3)

Level 1

100

9x+45

9(x+5)

200

7x^2-21x

7x(x-7)

300

9x^2-1

(3x+1)(3x-1)

400

3n^2-75

3(n-5)(n+5)

500

12a^3 - 9a^2 + 4a - 3

(3a^2 + 1)( 4a - 3)

Level 2

100

16x^2 + 40x + 25

(4x+5)^2

200

36x^2 - 132x + 121

(6x-11)^2

300

x^2+3x+2

(x+2)(x+1)

400

x^2+x-6

(x+3)(x-2)

500

x^3+64

(x+4)(x^2-4x+16)