Question
Using an identity expand :
(2y+5)(2y+5)
(2y+5)(2y+5)
Answer: Option B
:
B
We know that,
(a+b)×(a+b)=(a+b)2
Using the identity
(a+b)2=a2+2ab+b2,
(2y+5)(2y+5)=(2y+5)2
=(2y)2+2(2y)(5)+52
=4y2+20y+25
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:
B
We know that,
(a+b)×(a+b)=(a+b)2
Using the identity
(a+b)2=a2+2ab+b2,
(2y+5)(2y+5)=(2y+5)2
=(2y)2+2(2y)(5)+52
=4y2+20y+25
Was this answer helpful ?
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