Answer: The answer is [tex]5x^3+11x^2-2x-8[/tex].
Step-by-step explanation:
Here, the given expression is,
[tex](5x^2+x-4)(x+2)[/tex]
By multiplying,
[tex]=(5x^2+x-4)x + (5x^2+x-4)2[/tex]
[tex]=5x^3+x^2-4x+10x^2+2x-8[/tex]
[tex]=5x^3+11x^2-2x-8[/tex]
Thus, We can write,
[tex](5x^2+x-4)(x+2)=5x^3+11x^2-2x-8[/tex]
