Question

(3x + 7y)(3x − 7y).

Answer 1

there both the same numbers, but one is addition the second is subtraction, all you have to do is the outers, because the inners cancel
3x^2 -21xy +21xy -49y^2
so whenever you see a binomial like that just do the outers

Answer 2

...

Answer 3

\[9x^{2}+42xy-14y ^{2}\]

Answer 4

@hawkinstyler68

Answer 5

@Muskan that's wrong...and read the rules too bud

Answer 6

9x2+42xy−49y2
sorry is that

Answer 7

no

Answer 8

Hmm.\[\rm 3x(3x -7y) + 7y(3x - 7y) = 9x^2 - 21y + 21y - 49y^2\]