Question

EU PRECISO DE AJUDA 
1) CORRIJA AS SENTENÇAS.
a) (x+3)² =x² + 9 ......................
b) (2a+b)²=2a² + 2ab+b²...................
c) (xy-5)²=x²y²+10xy+25................... 
d) (4a-3b²)²=16a²-9b²...................... 
e) (2x+1) (2x-1)=4x.......................

Answer 1

1) CORRIJA AS SENTENÇAS.
Já estou passando corrigida
a) (x+3)² = x³ + 6x +9

b) (2a+b)²=4a² +4ab + b²

c) (xy-5)²= x²y² - 10xy +25

d) (4a-3b²)²= 16 a² -24 ab +9(b elevado a 4)

e) (2x+1) (2x-1)= 4x²-1

Answer 2

a) (x+3)² =x² + 9 ==> x^2 + 6x +9......................
b) (2a+b)²=2a² + 2ab+b² ==> 4a² + 4ab + b²
c) (xy-5)²=x²y²+10xy+25 ==> x²y² + 10xy + 25
d) (4a-3b²)²=16a²-9b² ==> 16a² - 9b²
e) (2x+1) (2x-1)=4x.==> 4x^2 - 1