1) 2x(x⁴-5x³+3)=2x^5-10x^4+6x;
2) (y+2)(3y-5)=3y^2+6y-5y-10=3y^2+y-10;
3) (7x-3y)(2x+5y)=14x^2-6xy+35xy-15y^2=14x^2+29xy-15y^2;
4) (x-1)(x²-x-2)=x^3-x^2-2x-x^2+x+2=x^3-2x^2-x+2
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1) 2x(x⁴-5x³+3)=2x^5-10x^4+6x;
2) (y+2)(3y-5)=3y^2+6y-5y-10=3y^2+y-10;
3) (7x-3y)(2x+5y)=14x^2-6xy+35xy-15y^2=14x^2+29xy-15y^2;
4) (x-1)(x²-x-2)=x^3-x^2-2x-x^2+x+2=x^3-2x^2-x+2