Question

$x { }^{2} \times x ^{2} + 4 \:(add \: or \: subtrct \: x ^{2} )$
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Answer 1

Answer:

$( {x}^{2} + 2 - 2x)( {x}^{2} + 2 + 2x)$

Step-by-step explanation:

Given:

${x}^{2} \times {x}^{2} + 4$

$= {x}^{4 } + 4 + 4 {x}^{2} - 4 {x}^{2}$

${(adding \: and \: subtracting \: 4 {x}^{2}) }$

${( {x}^{2} + 2) }^{2} - {(2x)}^{2}$

$= ({x}^{2} + 2 - 2x)( {x}^{2} + 2 + 2x)$

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