Question 628141: If you are looking at a graph of a quadratic equation y = ax2 + bx + c, how do you determine where the solutions to 0 = ax2 + bx + c are? Compare this with solving the equation using the quadratic formula.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! If you are looking at a graph of a quadratic equation y = ax2 + bx + c, how do you determine where the solutions to 0 = ax2 + bx + c are? Compare this with solving the equation using the quadratic formula.
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Formula: x = [-b +- sqrt(b^2-4ac)]/(2a)
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If b^2-4ac = 0, solutions are -b/2a and are two equal Real Numbers
If b^2-4ac < 0, solutions are two complex numbers.
If b^2-4ac > 0, solutions are 2 unequal Real Numbers.
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Cheers,
Stan H.
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