Question

1- Calcule os produtos notaveis

a - (5a+2)2
b - (3x-4)(3x+4)
c - (a+1)3
d - (a-2z)2
e - (2+3x)2
f - (a-2)3

Answer 1

a - (5a+2)2 = 25a2 + 20a + 4
===========================================
b - (3x-4)(3x+4) = 9x2 - 16
===========================================
c - (a+1)3 = a3 + 3.a2.1 + 3a.1^2 + 1^3 ==>  a3 + 3a2 + 3a + 1
====================================================
d - (a-2z)2 =  a2 - 4az + 4z2
====================================================
e - (2+3x)2 = 4 + 12x + 9x2
====================================================
f - (a-2)3 = a3 + 3.a2.(-2) + 3a.(-2)^2 + (-2)^3 ==>  a3 -6a2 + 12a - 8