Login
0
June 30, 2020, 2:06 p.m.
Let f(x) = ax2 + bx + c, where a, b and c are certain constants and a ≠ 0? It is known that f(5) = −3f(2). and that 3 is a root of f(x) ≠ 0. What is the other root of f(x) = 0?

Let f(x) = ax2 + bx + c, where a, b and c are certain constants and a ≠ 0 ? It is known that f(5) = −3f(2). and that 3 is a root of f(x) ≠ 0. What is the other root of f(x) = 0?

1. -7
2. -4
3. 2
4. 6
5. cannot be determined
quant
function
Add Comment to Question
ANSWERS
0
July 11, 2020, 2:55 p.m.

It's easy, we know 3 is one of the root, put in equation and find new equation with a,b and c

we can get other equation with f(5) = -3f(2)

compare both and you will get a=b.

and now you will be able to find your answer

can you explain me in details -- by @parth0606 July 11, 2020, 3:02 p.m.
Add Comment to Answer
In Order to answer this Question please login
Tags
quant
numbers
cat-2019
varc
rc
set-theory
time-speed-distance
quadratic
geometry
cat
Stats
Total Questions
57
Total Answers
32