Question

Qual a resolução de (x+1)^2=100

Answer 1

( x + 1)² = 100

[ (x)² + 2 * x * 1 + (1)²] = 100

x² + 2x + 1 = 100

x² + 2x + 1 - 100 = 0

x² + 2x - 99 = 0

delta = ( 2)² - [ 4 * 1 * (-99)] = 4 + 396 = 400 ou V400 = +-20****

x = ( -2 +-20)/2

x1 = -22/2 = - 11 ***

x2 = 18/2 = 9 ***