Question

AYUDAA PORFAA ESS PARA HOYYYY​

Answer 1

Explicación paso a paso:

A.

${(2 + 5 \sqrt{x} ) }^{2} = {2}^{2} + 2(2)(5 \sqrt{x} ) + {(5 \sqrt{x} })^{2} = 4 + 20 \sqrt{x} + 25x$

B.

${( \sqrt{3a} - \sqrt{5a} ) }^{2} = { \sqrt{3a} }^{2} - 2( \sqrt{3a} )( \sqrt{5a} ) + { \sqrt{5a} }^{2} = 3a - 2 \sqrt{15a} + 5a = 8a - 2 \sqrt{15a}$

C.

$( { \sqrt{x + 3}) }^{2} - 2( \sqrt{x + 3)} ( \sqrt{x - 3)} + { (\sqrt{x - 3} })^{2} = x + 3 + x - 3 - 2 \sqrt{2x} = 2x - 2 \sqrt{2x}$