Question

hlo frnds answer this
$( {x}^{2} + {y}^{2} )( {a}^{2} + {b}^{2} ) = {(ax + by)}^{2}$
prove that
$\frac{x}{a} = \frac{y}{b}$
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Answer 1

hey mate here's your answer-

hope it helps...!!!

Answer 2

$\sf{REFER \:THE \:ATTACHMENT}$