Q. For the following quadratic equation, find the discriminant.−6x2+20x+36=−7x2Answer:
Simplify Quadratic Equation: First, we need to simplify the quadratic equation by moving all terms to one side of the equation.−6x2+20x+36=−7x2Add 7x2 to both sides to combine like terms.−6x2+7x2+20x+36=0
Combine Like Terms: Now, we simplify the left side of the equation by combining like terms.(7x2−6x2)+20x+36=0x2+20x+36=0
Standard Form: The quadratic equation is now in standard form, which is ax2+bx+c=0. Here, a=1, b=20, and c=36. To find the discriminant of a quadratic equation, we use the formula: discriminant=b2−4ac.
Calculate Discriminant: Substitute the values of a, b, and c into the discriminant formula.discriminant=202−4(1)(36)discriminant=400−144
Final Calculation: Now, calculate the value of the discriminant.discriminant = 400−144discriminant = 256