Question

Use the quadratic formula to solve the equation 5x^2 - 7x - 3 = 0 .


a. x=(7+sqrt(109))/10 and x=(7-sqrt(109))/10
b. x=(7+sqrt(11))/10 and x=(7-sqrt(11))/10
c. No solution
d. x=(-7+sqrt(109))/10 and x=(-7-sqrt(109))/10

Answer 1

Do you know the quadratic formula?

Answer 2

no but i thinki do. But after that i dont what to do

Answer 3

Just plug in and tell me what you get.

Answer 4

5^2-7x+3=0

Answer 5

Apply the quadratic formula for ax^2+bx+c:

\[x=\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}\]