Question

${(a + b)}^{2} + {(a - b)}^{2}$
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Answer 1

Step-by-step explanation:

Here,

(a+b)² + ( a - b)²

According to formula of a² + b²

(a+ b + a - b) ² - 2 .(a +b) .( a - b)

(2a)² -2a -2b -2a + 2b

4a² -4a

4a( a - 1)

Answer 2

(a +b) sq.+(a-b).
that is (2a +2b) +(2a-2b)
So now follow method
i.e 2b will go and subract from 2b on other side