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Full equation is (-b +/- sqrt(b2 - 4ac))/2a.

Try it with x2 - 2x - 3, where a = 1, b = -2 and c = -3...

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Q: B2 -4ac in the quadratic equation ax2 plus bx plus c equals 0?
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In the quadratic equation ax2 plus bx plus c 0 if b2 - 4ac?

If you mean b^2 -4ac then it is the discriminant of a quadratic equation. If the discriminant equals 0 then the equation has 2 equal roots. If the discriminant is greater than 0 then the equation has 2 different roots. If the discriminant is less than 0 then it has no real roots.


What solution is for ax2 plus bx plus c equals 0?

The answer to this is the Quadratic Formula, which is: (-b +/- (b2 - 4ac)1/2 )/2a -- as you might have guessed, +/- means there are two solutions for this equation.


What is the formula of a quadratic equation?

The quadratic equation in standard form is: ax2 + bx + c = 0. The solution is x = [-b ± √b2- 4ac)] ÷ 2a You can use either plus or minus - a quadratic equation may have two solutions.


What indicates that the roots of a quadratic are irrational?

In the quadratic equation, b^2 - 4ac < 0.


When the roots are equal of a quadratic equation?

Write the quadratic equation in the form ax2 + bx + c = 0 The roots are equal if and only if b2 - 4ac = 0. The expression, b2-4ac is called the [quadratic] discriminant.


The degree of a quadratic equation?

The Quadratic Formula song: (my grade saver) To the tune of the jack in the box song X equals negative B plus or minus square root of B squared minus 4AC all over 2A :)


Is b squared-4ac called simplest form?

No, it is the discriminant of a quadratic equation.


What is the value of b2-4ac equal to 0?

It is the value of the discriminant of a quadratic equation.


Why quadratic equations have two solutions?

If the discriminant of b2-4ac of the quadratic equation is greater the 0 then it will have 2 solutions.


The Quadratic Formula may be used to solve any quadratic equation?

Yes. But note that if b2 - 4ac is negative, there are no real solutions to the quadratic equation to be found. When complex numbers are used, this is not a problem as sqrt(-1) = i and so if b2 - 4ac is negative, "sqrt(b2 - 4ac)" becomes "i sqrt(4ac - b2)", meaning the solutions are: x = -b/2a + i/2a sqrt(4ac-b2) x = -b/2a - i/2a sqrt(4ac-b2)


What does the rule for a quadratic function tell you about how the graph of the function will look?

If the quadratic function is written as ax2 + bx + c then if a > 0 the function is cup shaped and if a < 0 it is cap shaped. (if a = 0 it is not a quadratic) if b2 > 4ac then the equation crosses the x-axis twice. if b2 = 4ac then the equation touches the x-axis (is a tangent to it). if b2 < 4ac then the equation does not cross the x-axis.


What is greater if a equals b equals c c 0 A equals a plus b B equals c?

well if the coefficient of a times the negative reciprical of b equals 4.33 then if you add all of them they should be able to fit in as themselves int the equation: x=-b(plus or minus) (the sqare root of:(b)(b)+-4ac) all divided by 2a, the basic quadratic equation its elementery me dear lad