Math, asked by riyasapariya, 1 year ago

simplife the following:
$(3x + 7y) { }^{2} - (3x - 7y) {}^{2}$

Answers

Answered by hukam0685

apply the identity
${x}^{2} - {y}^{2} = (x + y)(x - y) \\ ( {3x + 7y)}^{2} - ( {3x - 7y)}^{2} \\ = (3x + 7y + 3x - 7y)(3x + 7y - 3x + 7y) \\ = (3x + 3x)(7y + 7y) \\ = 6x(14y) \\ = 84xy$

Answered by sagar233324

hope its help you ....

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