Question

x^1/2-7x^1/4+12=0

Answer 1

The solution is supposed to be 81,256. I have no idea how they got there

Answer 2

lets substitute sqrX=t--------> t-7t^2+12=0----> -7t^2+1+12=0
D=b^2-4ac==1-4*(-7)*12>0
X1=(-b+sqrD)/2a
X2=(-b-sqrD)/2a then we substitute in t....this is how they must have gotten it :)

Answer 3

sorry but was 2 lazy 2 complete it with numbers :)

Answer 4

Thanks I think I figured it out.