Question

solve the following problems​

Answer 1

Step-by-step explanation:

i have one hint if you try i think your doubt clear.

if you take the splitting of middle term for LHS.....

i think you will git your answer.

Answer 2

(3x+7)²-84=(3x-7)²

9x²+49+42x-84=9x²+49-42x

9x²and 49 will be cancel on both sides

42x-84=-42x

transfer 42x on RHS

-84=84x

x=-1

please mark me as brainiest