Solve the given equation by factoring.
Table of contents
- 0. Review of College Algebra4h 45m
- 1. Measuring Angles40m
- 2. Trigonometric Functions on Right Triangles2h 5m
- 3. Unit Circle1h 19m
- 4. Graphing Trigonometric Functions1h 19m
- 5. Inverse Trigonometric Functions and Basic Trigonometric Equations1h 41m
- 6. Trigonometric Identities and More Equations2h 34m
- 7. Non-Right Triangles1h 38m
- 8. Vectors2h 25m
- 9. Polar Equations2h 5m
- 10. Parametric Equations1h 6m
- 11. Graphing Complex Numbers1h 7m
0. Review of College Algebra
Solving Quadratic Equations
Multiple Choice
Solve the given quadratic equation using the quadratic formula. 2x2−3x=−3
A
x=43+4i15,x=43−4i15
B
x=43+45i,x=43−45i
C
x=43+15,x=43−15
D
x=3+i15,x=3−i15
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Verified step by step guidance1
First, rewrite the given equation in standard quadratic form, which is ax^2 + bx + c = 0. The given equation is 2x^2 - 3x = -3, so we can rewrite it as 2x^2 - 3x + 3 = 0.
Identify the coefficients a, b, and c from the quadratic equation. Here, a = 2, b = -3, and c = 3.
Use the quadratic formula to find the solutions for x. The quadratic formula is x = \(\frac{-b \pm \sqrt{b^2 - 4ac}\)}{2a}. Substitute the values of a, b, and c into the formula.
Calculate the discriminant, which is the part under the square root in the quadratic formula: b^2 - 4ac. Substitute the values to find the discriminant: (-3)^2 - 4(2)(3).
Since the discriminant is negative, the solutions will be complex numbers. Proceed to calculate the solutions using the quadratic formula, keeping in mind that the square root of a negative number involves imaginary numbers.
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