Question

Verify that (11pq +4q)^2 - (11pq - 4q)^2 = 176pq^2
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Answer 1

Answer:

LHS=

121p²q² + 16q² + 88pq²- 121p²q²+ 14q² - 88pq²

16q²+14q² = 30q² is not equal to 176pq²

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Answer 2

Answer:

(11pq + 4q + 11pq – 4q) × (11pq + 4q – 11pq + 4q) [using a2 – b2 = (a – b) (a + b), here a = 11pq + 4q and b = 11 pq – 4q] = (22pq) (8q) = 176 pq2 R.H.S. Hence Verified

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