Question

find the sqaure of 3x-4y​

Answer 1

Explanation:

(3x-4y)²

= (3x)²-2(3x)(4y)+(4y)²

= 9x²-24xy+16y² or 9x²+16y²-24xy

Answer 2

Answer

We know that,

(a−b)

2

=a

2

+b

2

−2ab

∴(3x−4y)

2

=(3x)

2

+(4y)

2

−2(3x)(4y)

=9x

2

+16y

2

−24xy

Hence, option (D) is correct.