Question

(3x+1)×(x la 2 +2x-5)-(x+2)×(2x la 2-x+3)

Answer 1

(3x+1)×($x^{2}$+2x-5)-(x+2)×(2$x^{2}$-x+3)=

=(3$x^{3}$ + 6$x^{2}$ -15x+$x^{2}$ +2x-5)-(2$x^{3}$-$x^{2}$+3x+4$x^{2}$ -2x+6)=

=3$x^{3}$ +7$x^{2}$-13x-5-2$x^{3}$ -3$x^{2}$-x-6=

=$x^{3}$+4$x^{2}$-14x-11