Question

Calcule o valor das expressoes: a) ( √ a + √ b) 2 − 2 √ ab. b) (x + 1)2 + (x − 1)2 . c) (a + 1)2 + 2(a + 1)a + a 2 + 2(2a + 1) + 1.

Answer 1

A) (√a)²+(√b)²+ 2√AB -2√AB = a+b

B) (x²+ 2x+1) + (x² -2x +1) = 2x²+2

C) (a²+2a+1) + (2a²+2a) + a²+ (4a+2) + 1 =4a²+8a+4