Question

Desenvolva os produtos notáveis:

(x-11)²

(2x+5)²

(7x+3) . (7x-3)

(7x-3)²

(10x+7) . (10x-7)

(10x-6)²

Answer 1

(x-11)^2=x^2+2.x.(-11)+(-11)^2
x^2-22x+121
(2x+5)^2=2x^2+2.2x.5+5^2
2x^2+20x+25
(7x+3)(7x-3)=49x^2-21x+21x-9
49x^2-9
(7x-3)^2=7x^2-2.7x.(-3)+(-3)^2
7x^2+42x+9
(10x+7).(10x-7)=100x^2-70x+70x-49
100x^2-49
(10x-6)^2=10x^2-2.10.(-6)+(-6)^2
10x^2+120+36
10x^2+156