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pochemuha
3 years ago
7

Which function has exactly one real solution? A. f(x) = -4x2 + 9x B. f(x) = 2x2 + 4x – 5 C. f(x) = 6x2 + 11 D. f(x) = -3x2 + 30x

– 75​
Mathematics
1 answer:
yarga [219]3 years ago
5 0

Answer:

A.

{ \tt{f(x) =  - 4 {x}^{2} + 9x }}

Step-by-step explanation:

{ \tt{f(x) = x( - 4x + 9)}}

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For this case we have the following functions:

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x ^ 2-3x + 7 = x + 3\\x ^ 2-3x-x + 7-3 = 0\\x ^ 2-4x + 4 = 0

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