Answer:
20x^2 +19x - 60
Step-by-step explanation:
3x( 4x+5) -4 (-x-3) (2x -5)
Distribute
12x^2 +15x - 4 (-x-3) (2x -5)
FOIL
12x^2 +15x - 4( -2x^2 -6x +5x +15)
12x^2 +15x - 4( -2x^2 -x +15)
Distribute
12x^2 +15x +8x^2 +4x -60
Combine like terms
20x^2 +19x - 60
