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Solving Quadratic Equations by Using the Quadratic Formula
Solve each equation by using the Quadratic Formula. Round to the nearest tenth if necessary.
1. x25x36=0
2. x²+11x+30=0
3. x²-7x=-3
4. x² + 4x = -1
5. x29x+22 = 0
6. x²+6x+3=0
7.2x²+5x-7=0
9.2x23x-1
10.2x²+5x+4=0
State the value of the discriminant for each equation. Then determine the number of real solutions of the equation.
11. x²-2x-7-0
12. x210x + 25 = 0
13.2x²+5x-80
14.2x²+6x+12=0