Question

What is the value of the discriminant of the quadratic equation −1 = 5x2 −2x, and what does its value mean about the number of real number solutions the equation has?

Answer 1

We have:


`-1=5x^2-2x\\\\5x^2-2x+1=0`

so:


`a=5\qquad b=-2\qquad c=1`

and discriminant:


`\Delta=b^2-4ac=(-2)^2-4\cdot5\cdot1=4-20=\boxed{-16\ \textless \ 0}`

Discriminant is negative so there are no real solutions.

Answer 2

its A on edge

Explanation: