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+a²+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