Solve each equation in Exercises 83–108 by the method of your choice. 3/(x - 3) + 5/(x - 4) = (x2 - 20)/(x2 - 7x + 12)
Table of contents
- 0. Review of Algebra4h 18m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations1h 43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 5m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 22m
- 10. Combinatorics & Probability1h 45m
1. Equations & Inequalities
Completing the Square
Multiple Choice
Solve the given quadratic equation by completing the square. x2+3x−5=0
A
x=−23,x=25
B
x=−23,x=29
C
x=2−3+29,x=2−3−29
D
x=23+29,x=23−29
3 Comments
Verified step by step guidance1
Start with the quadratic equation: \( x^2 + 3x - 5 = 0 \). The goal is to complete the square to solve for \( x \).
Move the constant term to the other side of the equation: \( x^2 + 3x = 5 \).
To complete the square, take half of the coefficient of \( x \), which is \( \frac{3}{2} \), and square it: \( \left( \frac{3}{2} \right)^2 = \frac{9}{4} \).
Add \( \frac{9}{4} \) to both sides of the equation to form a perfect square trinomial on the left: \( x^2 + 3x + \frac{9}{4} = 5 + \frac{9}{4} \).
Rewrite the left side as a squared binomial: \( \left( x + \frac{3}{2} \right)^2 = \frac{29}{4} \). Now, solve for \( x \) by taking the square root of both sides and then isolating \( x \).
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