Question

(5m-3n)²=25m².................+9n²

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Answer 1

Answer:

Using formula (a-b)²= a² - 2ab + b²

(5m-3n)² = (5m)² - 2 × 5m×3n + (3n) ²

(5m-3n)² = 25m² - 30mn + 9n²

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Answer 2

Answer:

+10m-6n

identity :[(a+b)^2=a^2+2ab+b^2]

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