(7x-9y)(7x-9y) by suitable identity
Answers
Answered by
1
Answer:
49x2+81y2--126........….....
Answered by
3
Answer:
49x²+81y²-126xy
Step-by-step explanation:
(7x-9y)²
(a-b)²=a²+b²-2ab
(7x)²+(9y)²-2.7x.9y
49x²+81y²-126xy
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