STANDARD - 7
SUBJECT - maths
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Answer:
1...(288)(x^2)(y^2)
2..
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Answer:
1) 16xy × 18xy
= 16 × 18 × xy × xy
= 288x^2y^2
2) (4x + 5y) × (9x+ 7y)
=4x(9x+7y) + 5y(9x+7y)
=36x^2 + 28xy + 45xy + 35xy^2
= 36x^2 + 73xy + 35xy^3
Step-by-step explanation:
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