Answer:
Answer is =2x^3+3x^2-11x-6
Step-by-step explanation:
First of all multiply first and second bracket.
=x(2x+1) -2(2x+1)
=2x^2+x-4x-2
=2x^2-3x-2
Now multiply 2x^2-3x-2 with (x+3)
=x(2x^2-3x-2) +3(2x^2-3x-2)
=2x^3-3x^2-2x+6x^2-9x-6
=2x^3+3x^2-11x-6
