Question

Va rog sa ma ajutati
Fie a, x , y , z , numere reale nenule .Efectuati:
-4x·(3/4y)=?
(-3/7x)·(14x³-7x)=?
(-3/5x)·(2 1/2 xy)=?
11x²·(7/11xy)=?
(-√5/3)·(3a²√5-6a√5)=?
(5/4x-3/2y)·(-4xy³)=?
(15/11x²y³z-5/11x³y²z)÷(-5/11x²y²z)=?
(4/7 x³-5/14 x² -2/21 x)÷(- x/7)=?
(-2,5x⁵-1,5x₃)÷(-0,5x²)=?
(12√3 a⁴-6√3 a⁵)÷(5x²y)=?

Answer 1

$-\frac{3x}{y}$
$-3(2 x^{2} -1)$
$\frac{7x}{y}$
$-5a(a-2)$
$(5y-6x) y^{2}$
$- \frac{3x-y}{xy}$
$- \frac{24-15x-4 x^{2} }{6 x^{4} }$$5 x^{3}-3x$