Question

Solve using perfect square factoring patterns. y2 + 14y + 49 = 0
A:{0, –1}
B:{7}
C:{–7}
D:{7, –7}

Answer 1

y² + 14y + 49 = 0

We know a² + 2ab + b² = (a + b)²
(y)² + 2 x 7 x y + (7)² = 0
(y + 7)² = 0
y = -7

y = -7

Correct option C