Respuesta :

D1eformetal
B)(x+10).(x-6)=x²-6x+10x-60
x²+4x-60

C)(x+15).(x-4)=x²-4x+15x-60
x²+11x-60

D)(x+20).(x-3)=x²-3x+20x-60
x²+17x-60

But A,
(x+12)(x-5)=x²-5x+12x-60
x²+7x-60

A, is the correct answer..
GOOD LUCK!