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Burka [1]
3 years ago
5

Given the function f(x) = −5x2 − x + 20, find f(3).

Mathematics
2 answers:
Lera25 [3.4K]3 years ago
4 0

Answer: -28

given the function f(x) =-5x2 - x +20

find f(3)

lana66690 [7]3 years ago
3 0


f(x) = -5x^2 - x + 20;

f(3) = -5*3^2 - 3 + 20 = -5*9 - 3 + 20 = -45 - 3 + 20 = -28;

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NeX [460]

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Range → (-∞, ∞)

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Given function is,

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7 0
3 years ago
Cos^2 x+4sin^2 x/2=1
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\cos^22a+4\sin^2a=1\\\\1-(2\sin^2a)^2=1\qquad\text{subtract 1 from both sides}\\\\-(2\sin^2a)^2=0\to2\sin^2a=0\qquad\text{divide both sides by 2}\\\\\sin^2a=0\to\sin a=0\\\\a=k\pi\ for\ k\in\mathbb{Z}\\\\\dfrac{x}{2}=k\pi\qquad\text{multiply both sides by 2}\\\\\boxed{x=2k\pi\ for\ k\in\mathbb{Z}}

6 0
3 years ago
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Rus_ich [418]

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8 0
2 years ago
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sergey [27]

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144

So if you want to test this:

x^2 - 24x + 144

is

(x-12)^2

4 0
3 years ago
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