Question

Are (3x-7y)^2

and (3x)^2

-(7y)^2 same? Justify your answer​

Answer 1

Answer:

NO

Step-by-step explanation:

${(3x - 7y)}^{2} = {(3x)}^{2} + {(7y)}^{2} - 2.3x.7y$

${(3x - 7y)}^{2} = 9 {x}^{2} + + 49 {y}^{2} - 42xy$

But,

${(3x)}^{2} - {(7y)}^{2} = 9 {x}^{2} - 7 {y}^{2}$