Use the discriminant to describe the roots of each equation. Then select the best description.

7x^2 + 1 = 5x

A.double root
B.real and rational root
C.real and irrational root
D.imaginary root

Question

Use the discriminant to describe the roots of each equation. Then select the best description.

7x^2 + 1 = 5x

A.double root
B.real and rational root
C.real and irrational root
D.imaginary root

nnesha · Answer

first of all set the equation equal to 0

nnesha · Answer

and what's discriminant ?

anonymous · Answer

discriminant- the radicand in the quadratic formula.

anonymous · Answer

How do i set up the equation equal to 0?

nnesha · Answer

just move the x term to the right side

nnesha · Answer

$$\huge\rm 7x^2 + 1 = 5x  $$
how would you cancel out 5x from right side ?

anonymous · Answer

take 5x away from 7x

nnesha · Answer

hm no you can't take away 5x from 7x you can take x from 7x^2 but not 5 
bec 5 isn't a factor of 7

nnesha · Answer

to cancel out the 5x from right side you should subtract 5x both sides  |dw:1448322237782:dw|