Question 122123: Use the quadratic formula to solve.
2x squared - 5x = 3
Found 2 solutions by madhan_math, praseenakos@yahoo.com:
Answer by madhan_math(34)   (Show Source):
You can put this solution on YOUR website! Given equation is 2x^2-5x=3
2x^2-5x-3=0
Now the coefficient of x^2 and constant multiplying, we get
-6.
Then, we find two numbers that numbers will be added we get -5(the coefficient of x)and multiply that numbers will become -6.
Therefore, that numbers are -6, 1
Now the given equation becomes 2x^2-6x+x-3=0.
(We take common number from first two variables.)
i.e., 2x(x-3) + 1(x-3)=0
i.e., (2x+1)=0,(x-3)=0 are the factors of the given eqn.
Hence x=-1/2 and x=3.
(OR)
The problem also solve by using the formula
http://www.algebra.com/cgi-bin/plot-formula.mpl?expression=x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29&x=0003
In this equation a=2, b=-5, c=-3 and substitute these values in that formulae we will get x=-1/2 and x=3.
Answer by praseenakos@yahoo.com(507)  (Show Source):
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