4 years ago

Given the function fx)=-5x2-x+20 find f(3)

Mathematics

2 answers:

strojnjashka [21]4 years ago

8 0

For this problem, you must plug 3 into x...
f(x)= -5(3) - 3 + 20=
f(x)= -15 - 3 + 20=
f(x)= 2

babymother [125]4 years ago

4 0

Answer:

-28

Step-by-step explanation:

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4 0

3 years ago

<img src="https://tex.z-dn.net/?f=%28%5Csqrt%7B20%7D%20-%202%5Csqrt%7B45%7D%20%2B%5Csqrt%7B5%7D%20%29%2A%5Csqrt%7B5%7D" id="TexF

nataly862011 [7]

Answer:

Step-by-step explanation:

$(\sqrt{20} - 2\sqrt{45} +\sqrt{5} )*\sqrt{5}$

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= 10 - 2 × 15 + 5

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=<em><u> -15 (Ans)</u></em>

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3 years ago