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in Algebraic Expressions by (49.8k points)
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The value of (a + b)2 + (a – b)2 is

(a) 2a + 2b 

(b) 2a – 2b 

(c) 2a2 + 2b2 

(d) 2a2 – 2b2

1 Answer

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Best answer

(c) 2a2 + 2b2

(a + b)2 + (a – b)2 = (a2 + b2 + 2ab) + (a2 + b2 – 2ab)

= (a2 + a2) + (b2 + b2) + (2ab – 2ab)

= 2a2 + 2b2

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