Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Can you please explain how to do this problem
![**Solve by completing the square, please show all the steps:**
1) \( x^2 - 3x - 5 = 0 \)
### Solution Steps:
1. **Move the constant to the right side:**
\[
x^2 - 3x = 5
\]
2. **Find the value to complete the square:**
- Take half of the coefficient of \( x \), which is \(-3\), giving \(-\frac{3}{2}\).
- Square it: \(\left(-\frac{3}{2}\right)^2 = \frac{9}{4}\).
3. **Add and subtract this square inside the equation:**
\[
x^2 - 3x + \frac{9}{4} = 5 + \frac{9}{4}
\]
- The left side now becomes a perfect square trinomial.
4. **Write the left side as a squared binomial:**
\[
\left(x - \frac{3}{2}\right)^2 = \frac{29}{4}
\]
5. **Solve for \( x \) by taking the square root on both sides:**
\[
x - \frac{3}{2} = \pm \sqrt{\frac{29}{4}}
\]
\[
x - \frac{3}{2} = \pm \frac{\sqrt{29}}{2}
\]
6. **Isolate \( x \):**
\[
x = \frac{3}{2} \pm \frac{\sqrt{29}}{2}
\]
7. **Final solutions:**
\[
x = \frac{3 + \sqrt{29}}{2} \quad \text{or} \quad x = \frac{3 - \sqrt{29}}{2}
\]
These steps illustrate how to solve the quadratic equation by completing the square method.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7520b358-31b1-4002-8f56-f6e484ea4d66%2F47f74b91-aead-4412-9c67-891858a35c3a%2Fmz5vyj_processed.png&w=3840&q=75)
Transcribed Image Text:**Solve by completing the square, please show all the steps:**
1) \( x^2 - 3x - 5 = 0 \)
### Solution Steps:
1. **Move the constant to the right side:**
\[
x^2 - 3x = 5
\]
2. **Find the value to complete the square:**
- Take half of the coefficient of \( x \), which is \(-3\), giving \(-\frac{3}{2}\).
- Square it: \(\left(-\frac{3}{2}\right)^2 = \frac{9}{4}\).
3. **Add and subtract this square inside the equation:**
\[
x^2 - 3x + \frac{9}{4} = 5 + \frac{9}{4}
\]
- The left side now becomes a perfect square trinomial.
4. **Write the left side as a squared binomial:**
\[
\left(x - \frac{3}{2}\right)^2 = \frac{29}{4}
\]
5. **Solve for \( x \) by taking the square root on both sides:**
\[
x - \frac{3}{2} = \pm \sqrt{\frac{29}{4}}
\]
\[
x - \frac{3}{2} = \pm \frac{\sqrt{29}}{2}
\]
6. **Isolate \( x \):**
\[
x = \frac{3}{2} \pm \frac{\sqrt{29}}{2}
\]
7. **Final solutions:**
\[
x = \frac{3 + \sqrt{29}}{2} \quad \text{or} \quad x = \frac{3 - \sqrt{29}}{2}
\]
These steps illustrate how to solve the quadratic equation by completing the square method.
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