Q. For the following quadratic equation, find the discriminant.5x2−78x+471=−8x−4Answer:
Bring to Standard Form: First, we need to bring the equation to standard quadratic form ax2+bx+c=0. We do this by adding 8x and 4 to both sides of the equation. 5x2−78x+471+8x+4=0
Combine Like Terms: Now, combine like terms to simplify the equation.5x2−(78x−8x)+(471+4)=05x2−70x+475=0
Identify Quadratic Form: The standard form of a quadratic equation is ax2+bx+c=0. In this case, a=5, b=−70, and c=475. The discriminant of a quadratic equation is given by the formula D=b2−4ac.
Substitute into Discriminant Formula: Substitute the values of a, b, and c into the discriminant formula.D=(−70)2−4(5)(475)
Calculate Discriminant: Calculate the discriminant.D=4900−4(5)(475)D=4900−9500
Finalize Calculation: Finish the calculation to find the value of the discriminant. D=−4600