Question

ayúdame y te doy la coronita ​

Answer 1

Explicación paso a paso:

$( {x}^{2} + 7)^{2} =( {x}^{2} )^{2} + 2 {x}^{2} .7 + {7}^{2}$

$( {x}^{2} + 7)^{2} = {x}^{4} + 14 {x}^{2} + 49$