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- (9x + y)(9x + y)
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Question:
- (9x + y)(9x + y)
Solution:
As we know that,
- (a + b)² = a² + 2ab + b²
Given:
- a = 9x
- b = y
Putting the values on formula,
➨(9x + y)² = (9x)² + 2(9x)(y) + (y)²
➨(9x + y)² = 81x² + 18xy + y²
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