(4ab+3b )^2 - (4ab-3b )^2= 48ab²
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Step-by-step explanation:
a/q; LHS
= (4ab+3b)² - (4ab-3b)²
= (4ab)² +(3b)² +2×4ab×3b -{(4ab)² + (3b)² - 2×4ab×3b}
= 16a²b² + 9b²+24ab²- (16a²b² + 9b² - 24ab²)
= 16a²b² + 9b² +24ab²- 16a²b² -9b² +24ab²
= 48ab²
= RHS,...proved..
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