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I need a sample of how to solve x^2 + 6x - 16 = 0
I need a step by step process, as I do not understand
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There is a quadratic formula to solve any quadratic equation of the form
= .
This formula is
= .
It gives two solutions (two roots) (when you use the sign "+" at the square root) and (when you you use the sign "-" at the square root).
In your case a= 1, b= 6 and c= -16.
Apply the formula. You will get
= = = = .
So, the two roots are: = = = 2;
= = = -8.
The solutions of the given equations are 2 and -8.
Solved.
On solving quadratic equations see the lessons
- Introduction into Quadratic Equations
- PROOF of quadratic formula by completing the square
- Solving quadratic equations without quadratic formula
- Who is who in quadratic equations
- Using quadratic equations to solve word problems
in this site.
Also, you have this free of charge online textbook in ALGEBRA-I in this site
- ALGEBRA-I - YOUR ONLINE TEXTBOOK.
The referred lessons are the part of this textbook under the topic "Quadratic equations".