Answer :
Given the expression:
[tex](4x^2)(-3x^3)[/tex]Multiplying the coefficents 4 and -3 give -12
Multiplying the variables by summing the exponents
So,
[tex]\begin{gathered} (4x^2)(-3x^3)=(4\cdot-3)x^{2+3} \\ \\ -12x^5 \end{gathered}[/tex]So, the answer will be -12 x^5