Math, asked by Juhi3611, 8 hours ago

(3xy-7yz)²+84xy²z=(3xy+7yz)²

Answers

Answered by ashutosh1896

1

Answer:

L.H.S

(3xy - 7yz)2 +84xy²z

= 9x²y² + 49y²z² - 2 × 3 × 7xy²z+84xy²z

[. (a -

b)² = a² + b² - 2ab]

= 9x²y² + 49y²z² - 42xy²z+84xy²z

=9x²y² + 49y²z² +42xy²z

=

= (3xy + 7yz)²

b)² = a² + b² + 2ab]

[. (a +

= R.H.S

Hence proved.

please mark as brailiest

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