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

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

aravindg · Answer

Do you know the quadratic formula?

jenny.andrade · Answer

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

aravindg · Answer

Just plug in and tell me what you get.

jenny.andrade · Answer

5^2-7x+3=0

aravindg · Answer

Apply the quadratic formula for ax^2+bx+c:

$$x=\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}$$

jenny.andrade · Answer

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