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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?
- -7
- -4
- 2
- 6
- cannot be determined
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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.
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