Factoriser
S = 9a² + 3a
T = 22²³-4z
U = 5(b + 2) + 3b (b + 2)
V = (a + 7) (2a + 3) + ( a + 7)
W = (a-1)(a + 3) + (a-5) (a-1)
X = ( 3t-4) (t+5)-(2t+1) (3t-4)
A = ( p + 1)² + (p+1) (p+3)
B=(q-8)² - 25
C = ( 2t-3)²-(5t + 2)²
D=64z² 169
E =9-42b + 49b²
F = 25+ 20u + 4u²
G=(b-2) (2b-5)-(b-2) (5b-2)​