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Pre-Algebra Examples
Step 1
Step 1.1
To find the coordinate of the vertex, set the inside of the absolute value equal to . In this case, .
Step 1.2
Solve the equation to find the coordinate for the absolute value vertex.
Step 1.2.1
Add to both sides of the equation.
Step 1.2.2
Divide each term in by and simplify.
Step 1.2.2.1
Divide each term in by .
Step 1.2.2.2
Simplify the left side.
Step 1.2.2.2.1
Cancel the common factor of .
Step 1.2.2.2.1.1
Cancel the common factor.
Step 1.2.2.2.1.2
Divide by .
Step 1.3
Replace the variable with in the expression.
Step 1.4
Simplify .
Step 1.4.1
Simplify each term.
Step 1.4.1.1
Cancel the common factor of .
Step 1.4.1.1.1
Cancel the common factor.
Step 1.4.1.1.2
Rewrite the expression.
Step 1.4.1.2
Subtract from .
Step 1.4.1.3
The absolute value is the distance between a number and zero. The distance between and is .
Step 1.4.2
Add and .
Step 1.5
The absolute value vertex is .
Step 2
The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.
Interval Notation:
Set-Builder Notation:
Step 3
Step 3.1
Substitute the value into . In this case, the point is .
Step 3.1.1
Replace the variable with in the expression.
Step 3.1.2
Simplify the result.
Step 3.1.2.1
Simplify each term.
Step 3.1.2.1.1
Multiply by .
Step 3.1.2.1.2
Subtract from .
Step 3.1.2.1.3
The absolute value is the distance between a number and zero. The distance between and is .
Step 3.1.2.2
Add and .
Step 3.1.2.3
The final answer is .
Step 3.2
Substitute the value into . In this case, the point is .
Step 3.2.1
Replace the variable with in the expression.
Step 3.2.2
Simplify the result.
Step 3.2.2.1
Simplify each term.
Step 3.2.2.1.1
Multiply by .
Step 3.2.2.1.2
Subtract from .
Step 3.2.2.1.3
The absolute value is the distance between a number and zero. The distance between and is .
Step 3.2.2.2
Add and .
Step 3.2.2.3
The final answer is .
Step 3.3
Substitute the value into . In this case, the point is .
Step 3.3.1
Replace the variable with in the expression.
Step 3.3.2
Simplify the result.
Step 3.3.2.1
Simplify each term.
Step 3.3.2.1.1
Multiply by .
Step 3.3.2.1.2
Subtract from .
Step 3.3.2.1.3
The absolute value is the distance between a number and zero. The distance between and is .
Step 3.3.2.2
Add and .
Step 3.3.2.3
The final answer is .
Step 3.4
Substitute the value into . In this case, the point is .
Step 3.4.1
Replace the variable with in the expression.
Step 3.4.2
Simplify the result.
Step 3.4.2.1
Simplify each term.
Step 3.4.2.1.1
Multiply by .
Step 3.4.2.1.2
Subtract from .
Step 3.4.2.1.3
The absolute value is the distance between a number and zero. The distance between and is .
Step 3.4.2.2
Add and .
Step 3.4.2.3
The final answer is .
Step 3.5
The absolute value can be graphed using the points around the vertex
Step 4