Question

calcule os produtos notáveis
a)(a+2)(a-2)=

b)(x+3z)(x-3z)=

c)(2a-5)^2=

d)(2y+4)^2=

e)(x-3)^2=

f)(2a+b)^2=

Answer 1

a) (a+2)(a-2)=
a²-2a+2a-4=
a²-4

b) (x+3z).(x-3z)=
x²-3zx+3zx-9z²=
x²-9z²

c) (2a-5)²=
(2a)²-2*2a*5+5²=
4a²-20a+25

d)(2y+a)²=
(2y)²+2*2y*a+a²=
4y²+4ay+a²

e) (x-3)²=
x²-2*x*3+3²=
x²-6x+9

f) (2a+b)²=
(2a)²+2*2a*b+b²=
4a²+4ab+b²