Question

Prove that : ( 4a + 7b )² – ( 4a – 7b )² = 112 ab

please tell fast​

Answer 1

Answer:

Hope it helps you!!!!!!

Answer 2

Answer:

proved

Step-by-step explanation:

LHS

(4a+7b)²-112ab

=( (4a)²+2×4a×7b+(7b)² ) -112ab

=(16a²+56ab+49b² ) -112ab

=16a²+(56ab-112ab)+49b²

=16a²-56ab+49b²

=(4a)²-2×4a×7b+(7b)²

=(4a-7b)²

(proved)