WHAT'S THE SOLUTION FOR THESE INEQUALITIES?
a) x2+2x+1<0
b) x2+2x+1>0
10 / 4 / 12 QUADRATIC INEQUALITIES, RATIONAL AND ABSOLUTE VALUE INEQUALITIES
Some linear inequalities can be solved easily if we know some tips:
To learn how to deal with fractions:
regentsprep.RationalInequalities
To learn how to deal with absolute value inequalities:
regentsprep.absinequal
To learn how to deal with absolute value inequalities:
regentsprep.absinequal
10 / 4 / 12 INEQUALITIES
Here you´ll find some help for solving inequalities and graphing their solutions:
19 / 3 / 12 EQUIVALENT SYSTEMS OF LINEAR EQUATIONS
Two systems of linear equations are equivalent if they have the same solutions set.
In order to get an equivalent system we do elementary operations. That means that we can:
In the Gaussian Elimination Method for solving a system of linear equations we´ll try to get an equivalent system in a triangular form and after that, we´ll obtain the solutions by back substitution.
- Interchange two equations
- Multiply an equation by a non zero constant
- Add a multiple of one equation to another equation
In the Gaussian Elimination Method for solving a system of linear equations we´ll try to get an equivalent system in a triangular form and after that, we´ll obtain the solutions by back substitution.
16 / 3 / 12 EQUATIONS AND STRAIGHT LINES
TO KNOW MORE ABOUT EQUATIONS SYSTEMS AND ITS APLICATIONS , LET´S HAVE A LOOK AT THIS GEOGEBRA EXERCISE AND MOVE THE BUTTONS:
7 / 3 / 12 GRAPHING LINEAR EQUATIONS IN TWO VARIABLES
In order to learn how to draw linear equations in two variables:
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