Question

(x - 4)(x + 2)(x + 4)(x - 2) =

Answer 1

Respuesta:

${x}^{4} - 20 {x}^{2} + 64$

Explicación paso a paso:

$(a + b)(a - b) = {a}^{2} - {b}^{2}$

$(x + 2)(x - 2)(x - 4)(x + 4) =$

$( {x}^{2} - 4)( {x}^{2} - 16) =$

${x}^{4} - 16 {x}^{2} - 4 {x}^{2} + 64$

${x}^{4} - 20 {x}^{2} + 64$