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Georgia [21]
2 years ago
8

Find f(-2) if f(x)= 2x^2-x+5

Mathematics
2 answers:
Neko [114]2 years ago
5 0

Answer:

f(x) =  2{x}^{2}  - x + 5 \\ f( - 2) = 2 {( - 2)}^{2}  - ( - 2) + 5 \\ f( - 2) = 2(4) + 2 + 5 \\ f( - 2) = 8 + 2 + 5 \\  \boxed{f( - 2) = 15}

  • <u>f(-2) = 15</u> is the right answer.
Molodets [167]2 years ago
4 0

Please find attached photograph for your answer

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kramer

Answer:

Dhshshshhshsjehsjsjjsjssjsjsjsjsjsjjshhdhddhhdjdjddjdjjhdhdkdhjsdfggdhjjjjd

Step-by-step explanation:

7 0
3 years ago
Answer this question and i’ll give you extra points please
Elza [17]
Where is the question?
4 0
2 years ago
Help please!!
Oksanka [162]

Answer:

A = 48 cm^2

Step-by-step explanation:

I hope this helps

3 0
2 years ago
Determine how many zeros, how many real or complex, and find the roots for f(x) = x3 − 5x2 − 25x + 125.
miskamm [114]
We can write this as:-

P(x) = + x^3 - 5x^2 - 25x + 125
There are 2 changes of real sign so by Descartes Rule of  signs there are either 2  positive real roots or 0 positive roots.

P(-x)  = - x^3 - 5x^2 + 25x + 125 
There is just one change of sign  so  there is exactly 1 real negative root.

125 is a multiple of 5 so By rational root theorem  5 could be  a positive root.

P(5) =  125 - 125 - 125 + 125  = 0   so one zero is  5
if we divide   the polynomial by (x - 5) we get the quadratic
x^2 - 25 
(x + 5)(x - 5) = 0

x = 5,-5

so the roots are 5 (multiplicity 2)  and -5.
2 real positive zeroes  and one real negative zero
7 0
2 years ago
3 dollar 8 dimes +1 dollar 2 quarters 5 pennies
zepelin [54]

Answer:

5.35

Step-by-step explanation:

1.55 +3.80 = 5.35

7 0
3 years ago
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