Question

. Efetue as operações com polinomios:
a) (3a+5). (2b-4) =

b) 56a⁴b/48abª =

c) 7a²-3b+9-(-6a²+5b-8) =

d) (x+6). (3x+7) =

e) 2436/1 2 z³ =

Answer 1

$a)\\ \\ (3a+5)(2b-4)=~~~~~~~propriedade~distributiva\\ \\ 6ab-12a+10b-20$

$b)\\ \\ \frac{56a^{4}b}{48ab^{a}} =\\ \\ \frac{7a^{3}b}{6b^{a}}$

$c)\\ \\ (7a^{2}-3b+9)-(-6a^{2}+5b-8)=7a^{2}-3b+9+6a^{2}-5b+8=\\ \\ agrupe~termos~semelhantes~e~efetue:\\ \\ 7a^{2}+6a^{2}-3b-5b+9+8=\\ \\ 13a^{2} -8b+17$

$d)\\ \\ (x+6)(3x+7)=3x^{2} +7x+18x+42=\\ \\ 3x^{2}+25x+42$

$e)\\ \\ \frac{2436}{12z^{3}}= \frac{203}{z^{3}}$