Respuesta :

Use the FOIL method

First 4x × -2x = -8x^2
Outside 4x × -5 = -20x
Inside 3 × -2x = -6x
Last 3 × -5 = -15

-8x^2 - 20x - 6x -15 =

Combine like terms

-8x^2 -26x -15
4×3=12
and -2×-5=10
and there product is
12×10= 120