Question

मान ज्ञात कीजिए(a+b)²+(a-b)²​

Answer 1

Answer:

${(a + b)}^{2} + {(a - b)}^{2} \\ = ({a}^{2} + {b}^{2} + 2ab) + ( {a}^{2} + {b}^{2} - 2ab) \\ = {a}^{2} + {b}^{2} \cancel{ + 2ab }+ {a}^{2} + {b}^{2} \cancel{ - 2ab} \\ = {a}^{2} + {b}^{2} + {a}^{2} + {b}^{2} \\ = 2 {a}^{2} + 2 {b}^{2} \\ = \underline{ \underline{2( {a}^{2} + {b}^{2})}}$