Math, asked by wizard6, 1 year ago

(7x+11y)(7x-11y=?.????????????

Answers

Answered by MarkAsBrainliest
4
Answer :

Now,

(7x + 11y) (7x - 11y)

= (7x)² - (11y)²,

using the identity a² - b² = (a + b) (a - b)

= 49x² - 121y², since 7² = 49 & 11² = 121

Alternative method.

Now, (7x + 11y) (7x - 11y)

= (7x × 7x) - (7x × 11y) + (11y × 7x) - (11y × 11y)

= 49x² - 77xy + 77xy - 121y²

= 49x² - 121y²

#MarkAsBrainliest
Answered by Robin0071
3
Solution:-

given by:-

(7x + 11y)(7x - 11y) \\  {(7x)}^{2}  -  {(11y)}^{2}  \\  {49x}^{2}  -  {121y}^{2}
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