Question

Preciso dos cálculos

Answer 1

Resposta:

a) (2a+3)*2 =4a *2 +9

b)(2+9x)*2=4+81x*2

Answer 2

a) (2a+3)²=4a²+12a+9

b) (2+9x)²=4+36x+81x²

c) (6x–y)²=36x²–12xy+y²

d) (a³–2b)²=a⁶–4a³+4b²

e) (7a+1)(7a–1)=49a²–1

f) (10a–bc)(10a+bc) =100a²–b²c²

g) (x²+2a)²=x⁴+4x²a+4a²

h) (m²–n²)²=m⁴–2m²n²+n⁴