Question

how many real roots does the polynomial 2x^5+8x-7 have

Answer 1

Try graphing it but you will find just one because the function looks like x^5 alone for any x except very close to the origin (close to x = 1). For small x , x<1 it looks like 8x-7 or x = 7/8 approximately for the zero

Answer 2

So does this polynomial, when graphed, intersect the x-axis or it just comes close?

Answer 3

It just intersects at the point (0, -7), right?