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Methods of Solving Quadtratic Equations

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1. There are four different methods to solve quadratic equations.
(a) List all 4 methods.
(b) Explain and give an example of 3 of those methods.
(c) Explain which method is preferred and why.

2. Solve the following problems.
a) Solve by using the even-root property.
3x - 5 = 16

b) Solve by using the following methods: factoring, completing the square, and the quadratic formula.
x + 10x = -9

c) Solve using the following methods: factoring, completing the square, and the quadratic formula.
x - 7x +12 = 0

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Solution Summary

This solution provides detailed explanations and step-by-step calculations of all methods involved in solving Quadratic Equations, along with examples. Each of the examples is solved by all the methods in order to provide a clear comparison between the various methods.

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a) The methods used to solve Quadratic Equations of the form ax2+bx+c = 0, are as follows:
1. Factorization
2. Extraction of Roots
3. Completing the Square
4. Quadratic Formula

b) Three methods of solving Quadratic equations with examples are as follows:

1. Solution of a Quadratic Equation by the method of Factorization:
Quadratic Equation: 10x² + 5x = 30
Solution:
Write in standard from. 10x² +5x -30 = 0.
On Factorizing L.H.S, 5(2x² + x - 6) = 0
Again on Factorizing, 5(2x - 3)(x + 2) = 0
First factor is 5, which cannot be zero.
Therefore, ...

Solution provided by:
Anwesha Ghosh, MSc
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  • MSc, Osmania University
  • MSc, Indian Institute of Technology - Roorkee (I.I.T.-ROORKEE)
  • BSc, Banaras Hindu University
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