Question

B = (y + 2)² + (3y – 1)²

Answer 1

(y + 2)²= y² + 2.y.2 + 2²= y² + 4y + 4
(3y - 1)²= (3y)² - 2.3y.1 + 1²= 9y² - 6y + 1
y² + 4y + 4 + 9y² - 6y + 1
10y² - 2y + 5
Bons Estudos...