14. Find the product of (a+b) (a+b2)
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(a+b)(a+2b)
=a^2+a2b+ba+b^2+b
=a^2+b^2+a2b+ba+b
=a^2+b^2+a2b+a2b
=a^2+b^2+2(a+b)
=(a+b)^2+2(a+b)
=a^2+a2b+ba+b^2+b
=a^2+b^2+a2b+ba+b
=a^2+b^2+a2b+a2b
=a^2+b^2+2(a+b)
=(a+b)^2+2(a+b)
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