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Sethu Pratheeksha Monick
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How do you expand (x+7)2(x+7)^2?

Where am I?

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Basic formula of Binomials.

i.e (a+b)2=a2+2ab+b2(a+b)^2=a^2+2ab+b^2

The question is given in the form of left hand side of the above formula(i.e (x+7)2(x+7)^2)

Where a=x,b=7

(x+7)2=x2+2x7+72(x+7)^2=x^2+2\cdot x\cdot7+7^2

=x2+14x+49=x^2+14x+49

Solving the problem and assigning a,b value 

in the above formula 

(x+7)2=x2+14x+49(x+7)^2=x^2+14x+49Using the above formula gets you the result