Respuesta :

13ab^3 + 39a^2b^4
Apply exponent rule :[tex]a^{b+c} = a^{b}a^{c} [/tex]
a^2b^4=aab^3b
=39aab^3b+13ab^3
Factor out common term :13ab^3
=13ab^3(3ab+1)

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