(4x+7y)^2-(4x-7y)^2=112xy
Answers
Answered by
16
Step-by-step explanation:
(4x + 7y)² - (4x - 7y)² = 112xy
= 16x² + 49y² + 56xy - 16x² - 49y² + 56xy = 112 xy
= 56xy + 56xy = 112 xy
112xy = 112xy
Hence proved
Similar questions