Question

simplify
$(5x - 7y)(5x + 7y)$
I hope solve this question

Answer 1

$(5x - 7y)(5x + 7y) \\ = ( {5x)}^{2} - ( {7y})^{2} \\ = 25 {x}^{2} - 49 {y}^{2}$
Heyy friend your answer is here

Answer 2

hey your ans is here


_______

given

(5x-7y)(5x+7y)

now its forming an identity

a2-b2=(a+b)(a-b)

so

(5x-7y)(5x+7y)=25x2-49y2

_______