Factoring by GCF
Question 1
Question 5
(2n2 - 7)(5n - 6)
Question 9
6(x + 6)(x + 5)
3r2 - 48
Factor out a GCF, then use difference of squares
3(r2 - 16) = 2(r - 4) (r + 4)
Question 2
11(b2 + 55)
Question 6
(3m2 +2)(m + 5)
Question 10
3r2 + 54r + 240
3(r2 + 18r + 80)
3(r + 10) (r + 8)
Question 3
9n(1 + 6n)
Question 7
(5x2 - 2) (5x + 4)
Question 11
2x3 - 4x2 - 4x + 8
2(x2 - 2)(x - 2)
Question 4
9k3(9k - 10)
Question 8
(3b2 - 5)(7b - 1)
Question 13
4(a + 9)(a + 1)
12r3 + 18r2 - 6r - 9
Factor out a GCF, then factor by grouping
3(2r2 - 1)(2r + 3)