Resposta:
c) [tex]7x^2\sqrt{y}[/tex]
d)[tex]-2\sqrt{a^3b^3}[/tex]
Explicação passo-a-passo:
c)
[tex]3xx^{\frac{2}{2} } \sqrt{y} -2x^{\frac{4}{2}} \sqrt{y} +6x^2\sqrt{y}\\\\3xx\sqrt{y}-2x^2\sqrt{y}+6x^2\sqrt{y}\\\\3x^2\sqrt{y}-2x^2\sqrt{y}+6x^2\sqrt{y}\\\\x^2\sqrt{y}(3-2+6)\\\\7x^2\sqrt{y}[/tex]
d)
[tex]3aa^{\frac{1}{2} }\sqrt{b^3} -7bb^{\frac{1}{2}} \sqrt{a^3} +ab(ab)^\frac{1}{2} \sqrt{4} \\\\3a^{\frac{3}{2}}\sqrt{b^3} -7b^{\frac{3}{2}} \sqrt{a^3}+2(ab)^{\frac{3}{2}} \\\\3\sqrt{a^3b^3}-7\sqrt{a^3b^3}+2\sqrt{a^3b^3} \\\\(3-7+2)\sqrt{a^3b^3}\\\\-2\sqrt{a^3b^3}[/tex]
