Question

упростите выражение 5x^2-(3x^2-(x^2+x)+(2x-1))
4x-(-(2x-1)+(x-4))+1
1-(4ab^2-(2a^2b-ab)+(ab^2+2a^2b)+ab)

Answer 1

1)5a(a-2b)-2b(4a+b)= 5a^2-10ab-8ab-2b^2=5a^2-18ab-2b^2
2) 4x-3x(x+1) = 4x-3x^2-3x=x-3x^2
3) 2x^2(x+1)+x^2(x-3)=2x^3+2x^2+x^3-3x^2=3x^3-x^2