Question

How many real number solutions does the equation have ? 7x^2 +8x+5=0 A. One solution B. Two solutions C. No solutions D. Infinitely many solutions

Answer 1

are you familiar with the discriminant? \[b^2 - 4ac\]

Answer 2

Not really

Answer 3

are you familiar with the quadratic formula then? \[x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\]

Answer 4

Yes

Answer 5

so you know what a, b and c mean?

Answer 6

Yes

Answer 7

so what are a, b and c in \[7x^2 + 8x + 5\]

Answer 8

A is 7x^2
B is 8x
C is 5

Answer 9

a = 7
b = 8
c = 5

right?

Answer 10

Oo yes ! I get it

Answer 11

good. so now substitute those into \[b^2 - 4ac\]
what do you get?

Answer 12

-76