Question
Use the table to answer the question.
x Substituted Evaluate True Statement?
−23
0
12
For the quadratic equation x2+20x=69 , complete the table by testing each of the given values to determine whether it is a solution. Identify which one of these values is in the solution set.
(1 point)
Only x= is in the solution set.
x Substituted Evaluate True Statement?
−23
0
12
For the quadratic equation x2+20x=69 , complete the table by testing each of the given values to determine whether it is a solution. Identify which one of these values is in the solution set.
(1 point)
Only x= is in the solution set.
Answers
There are no human answers yet.
Answered by
GPT-4o mini
To determine which value(s) is/are in the solution set for the quadratic equation \(x^2 + 20x = 69\), we first need to rearrange the equation:
\[
x^2 + 20x - 69 = 0
\]
Next, we will substitute each value (-23, 0, and 12) into the equation and evaluate to see if the equation holds true (i.e., equals 0).
### Testing each value
1. **For \(x = -23\)**:
\[
(-23)^2 + 20(-23) - 69 = 529 - 460 - 69 = 0
\]
Thus, the statement is true.
2. **For \(x = 0\)**:
\[
(0)^2 + 20(0) - 69 = 0 + 0 - 69 = -69
\]
Thus, the statement is false.
3. **For \(x = 12\)**:
\[
(12)^2 + 20(12) - 69 = 144 + 240 - 69 = 315
\]
Thus, the statement is false.
Now, we summarize the evaluations in the table:
| \(x\) | Substituted | Evaluate | True Statement? |
|---------|---------------------------|--------------------------|------------------|
| -23 | \((-23)^2 + 20(-23) - 69\) | \(0\) | True |
| 0 | \(0^2 + 20(0) - 69\) | \(-69\) | False |
| 12 | \(12^2 + 20(12) - 69\) | \(315\) | False |
### Conclusion
Only \(x = -23\) is in the solution set.
So, the final answer is:
Only \(x = -23\) is in the solution set.
\[
x^2 + 20x - 69 = 0
\]
Next, we will substitute each value (-23, 0, and 12) into the equation and evaluate to see if the equation holds true (i.e., equals 0).
### Testing each value
1. **For \(x = -23\)**:
\[
(-23)^2 + 20(-23) - 69 = 529 - 460 - 69 = 0
\]
Thus, the statement is true.
2. **For \(x = 0\)**:
\[
(0)^2 + 20(0) - 69 = 0 + 0 - 69 = -69
\]
Thus, the statement is false.
3. **For \(x = 12\)**:
\[
(12)^2 + 20(12) - 69 = 144 + 240 - 69 = 315
\]
Thus, the statement is false.
Now, we summarize the evaluations in the table:
| \(x\) | Substituted | Evaluate | True Statement? |
|---------|---------------------------|--------------------------|------------------|
| -23 | \((-23)^2 + 20(-23) - 69\) | \(0\) | True |
| 0 | \(0^2 + 20(0) - 69\) | \(-69\) | False |
| 12 | \(12^2 + 20(12) - 69\) | \(315\) | False |
### Conclusion
Only \(x = -23\) is in the solution set.
So, the final answer is:
Only \(x = -23\) is in the solution set.
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