SOLUTION: i need help pleas use the quadriatic formula to solve each of the following quadratic equations. 2x^2 - 5x = 3

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Question 99096: i need help pleas use the quadriatic formula to solve each of the following quadratic equations.
2x^2 - 5x = 3
Found 2 solutions by aaaaaaaa, stanbon:
Answer by aaaaaaaa(138)   (Show Source): You can put this solution on YOUR website!


Solved by pluggable solver: SOLVE quadratic equation with variable
Quadratic equation (in our case ) has the following solutons:



For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=49 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 3, -0.5. Here's your graph:
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
2x^2 - 5x = 3
----------------------
2x^2 - 5x - 3 =0
a=2, b=-5, c=-3
x = [-b +- sqrt(b^2-4ac)]/[2a]
x = [5 +- sqrt (25-4*2*-3)]/[2*2]
x = [5 +- sqrt (49)]/4
x = [5 +- 7]/4
x = 12/4 = 3 or x= -2/4 = -1/2
===========================
Cheers,
Stan H.
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