1-4 Solving Absolute Value Equations
Evaluate each expression if x = –4 and y = –9.
3. SOLUTION: Substitute –4 for x and –9 for y and solve.
Solve each equation. Check your solutions.
11. SOLUTION: There appear to be two solutions,
Check: Substitute each value in the original equation.
The solution set is
.
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Manual each
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Evaluate
expression
21. a = –3, b = –5, and c = 4.2.
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The solution
set is Value Equations
.
1-4 Solving
Absolute
Evaluate each expression if a = –3, b = –5, and c = 4.2.
21. SOLUTION: Solve each equation. Check your solutions.
41. SOLUTION: There appear to be two solutions,
.
Check: Substitute the values in the original equation.
z = Manual .- Powered by Cognero
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There appear to be two solutions,
.
1-4 Solving Absolute Value Equations
Check: Substitute the values in the original equation.
z=
.
z=
.
Since
,
is an extraneous solution. The solution set is .
45. CRITIQUE Ana and Ling are solving
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Is either of them correct? Explain your reasoning.
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Since
,
is an extraneous solution. The solution set is .
1-4 Solving
Absolute Value Equations
45. CRITIQUE Ana and Ling are solving
Is either of them correct? Explain your reasoning.
SOLUTION: Both students solved the equation correctly. However Ana included an extraneous solution in her final answer. She
would have caught this error if she had checked to see if her answers were correct by substituting the values into the
original equation.Ling is correct. eSolutions Manual - Powered by Cognero
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