Question

in polynomial how to do the sum x square +4x +4

Answer 1

$x {}^{2} + 4x + 4 \\ = x {}^{2} +( 2 + 2)x + 4 \\ = x {}^{2} + 2x + 2x + 4 \\ = x(x + 2) + 2(x +2 ) \\ = (x + 2)(x + 2)$
OR
$x {}^{2} + 4x + 4 \\ = (x) {}^{2} + 2 \times x \times 2 + (2) {}^{2} \\ = (x + 2) {}^{2} \\ = (x + 2)(x + 2)$