Question

( 2y + 5 ) ( 2y - 5 )​

Answer 1

Answer:

4y²- 10y+10y-25 = 4y²-25

Step-by-step explanation:

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Answer 2

Answer:

4y^2+20y+25

Step-by-step explanation:

(2y+5)(2y+5)

Using,

(a+b)^2=a^2+2.a.b+b^2

we get the above equation.

=(2y+5)^2

=(2y)^2+2.2y.5+5^2

=4y^2+20y+25

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