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alinton06
04.09.2020 •
Mathematics
Factor out the Greatest common factor 6x4 - 18x3 +12x2
Group of answer choices
6x^2 ( x2 -3x + 2)
3x (2x3 -6x2 + 4x)
6 (x4 - 3x3 +2x2)
6x( x3 - 3x2 + 2x)
Solved
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Ответ:
Part 1
13Explanation:
We'll replace every copy of x with -3. Then use PEMDAS to simplify.
f(x) = -2x+7
f(-3) = -2(-3)+7
f(-3) = 6+7
f(-3) = 13
Part 2
-11Explanation:
We work backwards in a sense compared to what part 1 did. Instead of finding f(x) based on x, we determine what x must be for a given f(x).
We'll replace f(x) with 29 and solve for x like so
f(x) = -2x+7
29 = -2x+7
-2x+7 = 29
-2x = 29-7
-2x = 22
x = 22/(-2)
x = -11
Note how if you replaced x with -11, we'd get,
f(x) = -2x+7
f(-11) = -2(-11)+7
f(-11) = 22+7
f(-11) = 29
which helps confirm we have the correct answer.