Question

como resolver esta ecuación (x)(x-5)(40)= 12000

Answer 1

x(x-5)(40)=12000
(x^2-5x)(40)=12000
x^2-5x=12000/40
x^2-5x=300
x^2-5x-300=0

(x-20)(x+15)=0
x1= 20
x2= -15