Question

All formulas from class 7 to 10 in maths ...

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Answer 1

Answer:

This should be correct answer

Answer 2

Answer:

(a+b)² = a² + 2ab + b²

(a-b)² = i) a² - 2ab + b²

ii) (a+b)² - 4ab

a² + b² = i) (a+b)² - 2ab

ii) (a-b)² + 2ab

a² - b² = (a+b)(a-b)

(a+b)³ = a³ + b³ + 3ab(a+b)

(a-b)³ = a³ - b³ -3ab(a-b)

a³+b³ = (a-b)(a²+ab+b²)

a³-b³ = (a+b)(a²-ab+b²)

(a+b)² + (a-b)² = 2{a²+b²}

(a+b)² - (a-b)² = 4ab

done

hope it helps

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