Question

simplify (5a+2)^2 - (5a-2)^2​

Answer 1

Answer:

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Answer 2

Answer:40a

Step-by-step explanation:

using identity (a+b)^2=a^2+b^2+2ab  and  (a-b)^2=a^2+b^2-2ab

we get,  

25a^2 +4 + 20a -(25a^2 +4 -20a)

25a^2 -25a^2 +4 -4 +20a +20a

40a

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