Question

4x в квадрате -13x-12=0

Answer 1

4х²-13х-12=0
D=b²-4ac=13²-4*4*(-12)=169+192=361
√D=19

X1= (-b+√D)/2a=(13+19)/2*4=32/8=4
X2=(-b-√D)/2a=(13-19)/8=-6/8=-3/4