Question

решить неравенство x^+4x-12>5x

Answer 1

x^2+4х-5x-12>0

x2-x-12=0

D=b2-4ac=1+48=49

x1,x2=-b+(-)72

x1=4

x2=-3

Answer 2

x^+4x-12-5x

x^-x-12=0

D=1^-4*1*(-12)=49

x1/2=1+/-7/2=-3;4