Question

(y + 2)²+(y-2)^2-(y^2 + 2^2) please answer as fast as possible I will mark you please
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Answer 1

Answer:

(y+2)^2

Step-by-step explanation:

(y + 2)²+(y-2)^2-(y^2 + 2^2)

= y^2 +4y + 4 + y^2 - 4y + 4 - y^2 -4

= y^2 + 4

= (y+2)^2

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Answer 2

Since,

${(x + y)}^{2} = {x}^{2} + {y}^{2} + 2xy$

So,

$= {(y + 2)}^{2} + {(y - 2)}^{2} - ( {y}^{2} + {2}^{2} ) \\ \\ = ({y}^{2} + {2}^{2} + 4y) + ( {y}^{2} + {2}^{2} - 4y) \\ - ( {y}^{2} + {2}^{2} ) \\ \\ = {y}^{2} + 4 + 4y + {y}^{2} + 4 - 4y - {y}^{2} - 4 \\ \\ = {y }^{2} + 4$

hope it will help u ✨☺️