Question

Si (x+ 2)(x+ 6) = 20, halle el valor de J. J = (x+ 5)(x+ 3)

Answer 1

Explicación paso a paso:

$(x + 2)(x + 6) = 20 \\ {x}^{2} + 6x + 2x + 12 = 20 \\ {x}^{2} + 8x + 12 = 20 \\ {x}^{2} + 8x = 20 - 12 \\ {x}^{2} + 8x = 8 \\ \\ j = (x + 5)(x + 3) \\ j = {x}^{2} + 3x + 5x + 15 \\ j = {x}^{2} + 8x + 15 \\ j = 8 + 15 = 23$

Respuesta: 23