Math, asked by chitrabhavesh1977, 1 year ago

Find the square of 9x-7xy

Answers

Answered by ndhamani2002

$81{x}^{2} + 49 {xy}^{2} - 126 {x}^{2} y$

sujit4646: don't you know 7×9=63

ndhamani2002: means

Answered by vimalpandey987

$81x2 - 63x2y + 49x2y2$
I hope it helps you.
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sujit4646: do you know formula (a-b) square=a square +2ab-b square

sujit4646: answer is 9xsquare+63xsquarey-49xsquareysquare

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