Question

(7x-9y)(7x-9y) plz tell fast​

Answer 1

Answer:

(7x-9y)(7x-9y)

(7x-9y)²

(7x)²+(9y)²-2 x 7X x 9Y

49x²+81y²-126xy

Answer 2

$\LARGE\mathfrak{\underline{\underline{Solution :-}}}$

$\qquad\tt{:}\longrightarrow \: \: \: = ( 7x - 9y )( 7x - 9y )$

$\qquad\tt{:}\longrightarrow \: \: \: = 7x ( 7x - 9y ) - 9y ( 7x - 9y )$

$\qquad\tt{:}\longrightarrow \: \: \: = 49x² - 63xy - 63xy + 81y²$

$\qquad\tt{:}\longrightarrow\: \: \: = 49x² - 126xy + 81y²$