10ax3-20ax^-2bx^+4bx-2x^+4x ** скобки пж

Question

10ax3-20ax^-2bx^+4bx-2x^+4x на скобки пж

Answer 1

10ax³ - 20ax² -2bx² +4bx -2x² +4x = 
=(10x³-20ax²)-(2bx²-4bx)-(2x²-4x)=
=10ax²(x-2)-2bx(x-2)-2x(x-2)=
=(x-2)(10ax²-2bx-2x)=
=2x(x-2)(5ax-b-1)