Question

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Answer 1

Answer:

Option (D)- 9a^2 +16b^2-24ab

Answer 2

Given :-

( 3a - 4b )

To Find :-

Square of the given

Solution :-

Before starting the answer , let's recall ;

• ( a - b )² = a² + b² - 2ab

Now , we have to find ( 3a - 4b )² , using above identity we have ;

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${ : \implies \quad \bf ( 3a - 4b)² = (3a)² + (4b)² - 2 \times 3a \times 4b}$

${ : \implies \quad \bf \therefore \quad ( 3a - 4b)² = 9a² + 16b² -24ab}$

Henceforth , option d) 9a² + 16b² - 24b is correct :)