Question

How many real-number solutions does the equation have?
y=-5x^2+8x-7
a. one solution
b. two solutions
c. no solutions
d. infinitely many solutions

Answer 1

@shamil98

Answer 2

use the discriminant

for a quadratic

\[ax^2 + bx + c\]

the discriminant is

\[\Delta = b^2 - 4ac\]

if > 0 there are 2 real solutions

if = 0 there is 1 repeated solution

if < 0 no real solutions...

Answer 3

you have a quadratic... the max number of solutions is 2.. so you can eliminate D

Answer 4

in the question a = -5, b = 8 and c = -7

Answer 5

b. two solutions