Question

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

Answer:

$(a +b) { }^{2} + ( a - b) {}^{2}</p><p>$

${a}^{2} + {b}^{2} + 2ab + {a}^{2} + {b}^{2} - 2ab$

$= 2( {a}^{2} + {b}^{2} )$

Answer 2

Answer:

Hope it helps :)

Step-by-step explanation:

So, (a+b)² becomes a² + 2ab + b²

And, (a-b)² becomes a² - 2ab + b²

= a² + 2ab + b² - (a² - 2ab + b²)

= a² + 2ab + b² - a² + 2ab - b²

= a² - a² + 2ab + 2ab + b² - b²

= 4ab