Question

x² + 8x + 16 = 0 x² + 2x – 48 = 0 x² - 1 = 0 x² + 3x – 40 = 0​

Answer 1

Respuesta:

1) x = -4

2) x = 6 ;  x = -8

3) x = 5 ;  x = -8

Explicación paso a paso:

1)

x² + 8x + 16 = 0

(x + 4)² = 0

X + 4 = 0

x = -4

2)

x² + 2x – 48 = 0

(x  - 6)  (x +  8) = 0

x-6 = 0   x = 6

x+8 = 0  x = -8

3)

x² + 3x – 40 = 0​

(x  - 5)  (x +  8) = 0

x - 5 = 0   x = 5

x + 8 = 0  x = -8