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Simplify : (7a + 5b)² + …

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Simplify : (7a + 5b)² + (5a + 7b)²

Posted by Vansh Sharawat 5 years, 3 months ago

CBSE > Class 08 > Mathematics

3 answers

Nakshi Shah 5 years, 3 months ago

(7a + 5b)² + (5a + 7b)² = (7a)2 + (5b)2 + 2(35ab) + (5a)2 + (7b)2 + 2(35ab) = 49a2 + 25b2 + 70ab + 25a2 + 49b2 + 70ab = 49a2 + 25a2 + 25b2 + 49b2 + 70ab + 70 ab = 74a2 + 74b2 + 140ab

0Thank You

Hardik Garg 5 years, 3 months ago

7a + 5b)² + (5a + 7b)² = (7a)2 + (5b)2 + 2(35ab) + (5a)2 + (7b)2 + 2(35ab) = 49a2 + 25b2 + 70ab + 25a2 + 49b2 + 70ab = 49a2 + 25a2 + 25b2 + 49b2 + 70ab + 70 ab = 74a2 + 74b2 + 140ab

0Thank You

Yogita Ingle 5 years, 3 months ago

(7a + 5b)² + (5a + 7b)²

= (7a)²+ (5b)² + 2(35ab) + (5a)² + (7b)² + 2(35ab)

= 49a² + 25b²+ 70ab + 25a² + 49b² + 70ab

= 49a² + 25a² + 25b² + 49b²+ 70ab + 70 ab

= 74a² + 74b² + 140ab

0Thank You

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