Question 1177627

1. 

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

multiply {{{3x^3*(-3)}}} and {{{5x*x^2}}} =>{{{-9x^3+5x^3=-4x^3}}}

2. 

{{{(x+1)^5}}} .....use binomial theorem

{{{5C2*x^(5-2)*1^(5-2)=10x^3}}}