[tex]\implies {\blue {\boxed {\boxed {\purple {\sf {20}}}}}}[/tex]
[tex]\sf \bf {\boxed {\mathbb {STEP-BY-STEP\:EXPLANATION:}}}[/tex]
[tex] = ( {2}^{2} + {4}^{2} )[/tex]
[tex] = [(2 \times 2) + (4 \times 4)][/tex]
[tex] = (4 + 16)[/tex]
[tex] = 20[/tex]
[tex]\large\mathfrak{{\pmb{\underline{\orange{Thank\:you! }}{\orange{❦}}}}}[/tex]