Answer:
[tex]10x^{3} - 26x^{2} - 12x[/tex]
Step-by-step explanation:
1) Use the FOIL method: (a+b)(c+d)=ac+ad+bc+bd.
[tex]10x^{3} - 30x^{2} + 4x^{2} -12x[/tex]
2) Collect like terms.
[tex]10x^{3} + (-30x^{2} +4x^{2} )-12x[/tex]
3) Simplify.
[tex]10x^{3} - 26x^{2} -12x[/tex]
Therefor, the answer is, 10x^3 - 26x^2 - 12x.
