Question

(3a - 7b) ^ 2 expand​

Answer 1

Answer:

we know that (a-b)^2 =a^2+b^2-2ab

hence (3a-7b)^2= 9a^2+49b^2-42ab

Answer 2

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GIVEN:-

(3a - 7b)²

SOLUTION:-

By the Formula,

(a-b)² = a² + b² - 2ab

(3a - 7b)² = (3a)²+(7b)²-2(3a)(7b)

= 9a² + 49b² - 42ab

• I Hope it's Helpful My Friend.