Question

es de formula general​

Answer 1

(x + 2)² = 4x + 20

(x + 2) (x + 2) = 4x + 20

x² + 2x + 2x + 4 = 4x + 20

x² + 4x + 4 = 4x + 20

x² + 4x - 4x + 4 - 20 = 0

x² - 16 = 0

a = 1

b = 0

c = -16

x = ± √ - 4 ac / 4a²

x = ± √ - 4 (1) (-16) / 4(1)²

x = ± √ 64 / 4

x = ± √16

x = ± 4

x1 = 4

x2 = -4

Espero haberte ayudado. Suerte en los estudios ≧◠◡◠≦.