Question

find the square by using the identites :(2xy+5y)²​

Answer 1

Answer:

(a+b)²=a²+b²+2ab

Step-by-step explanation:

using this identity

(2xy+5y)²=(4x²y²+25y² + 20xy²)

Answer 2

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$\large \: {(2xy + 5y)}^{2}$

Using the identity ;

$\large \: {(a + b)}^{2} = {a}^{2} + 2ab + {b}^{2}$

$➟ \: {(2xy)}^{2} + 2(2xy)(5y) + {(5y)}^{2}$

$➟ \: 4 {x}^{2} {y}^{2} + 20 {xy}^{2} + 25 {y}^{2}$

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