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Find the product : (a^2 + b) (a + b^2)

Q : 2         Find the product. 

                (iii) \small (a^2+b)(a+b^2)

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(a^{2} + b) X (a + b^{2})  = (a^{2})(a) + (a^{2})(b^{2}) + (b)(a) + (b)(b^{2})
                               = a^{3 } + a^{2}b^{2} + ab + b^{3}

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