The function f(x) = 2x2 + 3x + 5, when evaluated, gives a value of 19. What is the function’s input value?. A 1. B -1. C 2. D -2. E -3

asked Jan 19, 2017 46.2k views

0 votes

The function f(x) = 2x2 + 3x + 5, when evaluated, gives a value of 19. What is the function’s input value?.

A 1.
B -1.
C 2.
D -2.
E -3

8.1k points

Please log in or register to add a comment.

7 votes

Answer:

the answer is 2

Explanation:

Tkr answered Jan 20, 2017

by Tkr

8.3k points

5 votes

2 x² + 3 x + 5 = 19
2 x² + 3 x - 14 = 0
x 1/2 = (-3 +/- √ (9 + 112 ) )/4 = (-3+/-11)/4
x 1 = 2
x 2 = -7/2
Answer: C ) 2

Tarzen Chugh answered Jan 24, 2017

9.1k points

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers