Question

Выполните действия : а) (15y^6 z^2-25 y^8z): 5y^2 z b) -6x^3 -3(x^3-1)^2

Answer 1

A) -25y10z2+15y8z3/5
b) -3x6-3

Answer 2

А) $\frac{15 y^{6} z^{2}-25 y^{8}z }{5 y^{2} z} = \frac{5 y^{2}z(3 y^{4} z-5 y^{6}) }{5 y^{2} z} =3 y^{4} z-5 y^{6};$
б) $-6 x^{3} -3 ( x^{3}-1 )^{2} =-6 x^{3}-3( x^{6} -2 x^{3} +1) =$$=-6 x^{3} -3 x^{6} +6 x^{3} -3 = -3 x^{6} -3.$