Solve the equation using the quadratic formula. 2x2 â 18x + 40 = 0
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Part One:
Solve the equation by completing the square.
x2 - 3x - 15 = -5
x2 - 17x = -10x - 6
Find the discriminant of each quadratic equation.
-10x2 - 6x + 5 = 0
2x2 + 6x + 1 = 0
Part Two:
Use the quadratic formula to solve each equation.
2x2 - 5x + 4 = 0
12x2 - 5x - 7 = 0