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1. What values of a, b, and c would you use in the quadratic formula for the following equation?

5x^2 + 9x = 4

A. a = -4, b = 9, c = 5
B. a = 5, b = 9, c = -4
C. a = 5, b = -4, c = 9
D. a = 5, b = 9, c = 4

2. *Skipped*

3. What are the approximate solutions of 2x^2 - x + 10 = 0?

A. -2, 2.5
B. -1.97, 2.47
C. -2.5, 2
D. no solution

4. Solve the equation using the quadratic formula.

4x^2 + 3x - 10 = 0

A. x = -2, x = 1.25
B. x = -2, x = 2
C. x = -1.25, x = 2
D. x = -1.25, x = 1.25

CAN SOMEONE PLEASE HELP !!
The Quadratic Formula and the Discriminant Practice, Unit 4 Lesson 6.

Respuesta :

MrEquation
Answer: See each part below.

1) A, B, and C are the coefficients in order when it equals 0. Move over the 4 and you have 5, 9, -4 or Choice B.

3) If you graph the equation, it will be above the x-axis. Therefore, it has no roots. Choice D

4) Choice A is correct. Use the coefficients: A = 4, B = 3, C = -10. Simply plug those into the quadratic equation and you will get -2 and 1.25.

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