Question

Срочно! Уравнение решите плиз!
(5m-3)(1+4)=42-(10m+1)(3-2m)

Answer 1

(5m-3)(1+4)=42-(10m+1)(3-2m)
5m+20m-3-12=42-30m+20m^2+3-2m
25m-15=45-32m+20m^2
25m+32m-15-45-20m^2=0
57m-60-20m^2=0
-20m^2+57m-60=0
a=-20;b=57;c=-60
D=b^2-4*a*c
D=57^2-4*(-20)*(-60)
D=3249-4800
D=-1551