Solve using the quadratic formula. Round your answer to the nearest tenth: 3x2 = 5x + 7
A. {2.1, 0.4}
B. {-2.1, 0.4}
C. {-2.6, 0.9}
D. {2.6, -0.9}

Question

Solve using the quadratic formula. Round your answer to the nearest tenth: 3x2 = 5x + 7
A.		 {2.1, 0.4}
B.		 {-2.1, 0.4}
C.		 {-2.6, 0.9}
D.		 {2.6, -0.9}

anonymous · Answer

First you need to know the quadratic formula, do you?

anonymous · Answer

no i dont .. i dont have my notes on me.

anonymous · Answer

well that is pretty important to know

anonymous · Answer

when you have: ax^2+bx+c=0 (where a, b and c are just numbers) Than the solution for this equation is: http://en.wikipedia.org/wiki/Quadratic_equation

chaise · Answer

The quadratic formula is:
$$x = \frac{-b \pm \sqrt{b^{2}-4ac}}{2a}$$
You will get two answers in your equation.

a = the coefficient to the number you are squaring.
b = the coefficient of the linear term
c = the constant with no variable attached.

chaise · Answer

If all you're looking for is the answer - it is option D. If you need further help on Quadratics - I can help you with an in depth explanation and walk through of the question you are asking.

anonymous · Answer

okay...thank you!

anonymous · Answer

you are a hero chaise!

chaise · Answer

:) thanks sir. your accolades are appreciated.

anonymous · Answer

hahaha, anytime

anonymous · Answer

isn't the discriminant less than zero?