Question

Resolva as equações

(y+2)²+(y-2)²=106

Answer 1

(y+2)² + (y-2)² = 106
(y² + 4y + 4) + (y² - 4y + 4) -106=0
2x² - 98 = 0
x²= 98/2
x² = 49
x = +- raíz de 49
x'=7
x''=-7