Question

x^2-x-12=0
реште плиз

Answer 1

x^2 - x - 12 = 0 
D = 1 + 4*12 = 1 + 48 = 49 = 7^2
x1 = (1 +7)/2 = 8/2 = 4
x2 = ( 1 - 7)/2 = - 6/2 = - 3

Answer 2

D= (-1)^2-(-12*4)=1+48=49
X1=1-7/2=-3
X2=1+7/2= 4