Question

Show that (3x+7) square - 84x=(3x-7) square

Answer 1

Answer:

9x^2+49-42x

Step-by-step explanation:

(3x+7)^2-84x=9x^2+49+42-84x=9x^2+49-42x

(3x-7)^2=9x^2+49-42x

LHS=RHS

proved

Answer 2

here is your answer, I hope you got