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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

High School Mathematics
6.3 Solving Quadratic Equation by Using Quadratic Formula

The quadratic equation cannot be factored easily, and completing the square will result in many fractions. So, the equation can be solved using the quadratic formula.

Directions: Solve the following problems using quadratic formula and approximate the solution or round your solutions to the nearest hundredth.:
5x2 - 3 = 4x
x2 -12x - 14 = 0
5y2 - 7 = 11y
9t2 + 3t = 5
2x2 + 5 = 15
7a2 - 8 = 13
-6y2 + 15 = -15
4z2 + 7 = 12
3(x+3)2 = 39
5(y-1)2 = 40
2(x+4)2 = 18
4(z-5)2 = 32

Q 1: Solve, x2 - 11x + 28 = 0.
-4 and 7
-4 and -7
4 and -7
4 and 7

 Q 2: Solve, x2 - 4x - 21 = 0.
3 and 7
-3 and -7
-3 and 7
3 and -7

Q 3: Solve, x2 + 5x + 6 = 0.
-3 and 2
3 and 2
-3 and -2
3 and -2

 Q 4: Solve, 3x2 - 4x - 6 = 0.
2/3 and 3
-2/3 and 3
2/3 and -3
-2/3 and -3

Q 5: Solve, x2 - x - 6 = 0.
-3 and 2
3 and -2
-3 and -2
3 and 2

 Q 6: Solve, 2x2 + 13x + 15 = 0.
5/2 and 5
-3/2 and -5
-5/3 and 5
3/5 and -5

Question 7: This question is available to subscribers only!

 Question 8: This question is available to subscribers only!


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