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Elena-2011 [213]
3 years ago
14

If f(x)=3x^2-2x+5, find f(-2) a) -27 b) -11 c) -3 d) 21

Mathematics
1 answer:
Talja [164]3 years ago
3 0

Answer:

D

Step-by-step explanation:

f(x) = 3x^2 - 2x + 5

f(-2) means that wherever you see an x on the right, you put in the value of -2 for the x.

f(-2) = 3(-2)^2 - 2(-2) + 5

f(-2) = 3(4) + 4 + 5

f(-2) = 12 + 9

f(-2) = 21

The answer is D

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Makovka662 [10]

Answer:

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5 0
4 years ago
Take 2y 2 - 3y - 5 from y 3 - 6y 2 + 5y. Select the correct answer.
NNADVOKAT [17]

Answer:

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Step-by-step explanation:

Take one polynomial from the other means to perform the sub.traction of them. Recall that it is better to use grouping symbols when subtracting polynomials, so we get the signs right when combining like terms:

The indicated subtraction is: y^3-6y^2+5y - (2y^2-3y-5)

Make sure that before removing the grouping symbol (parenthesis) that is preceded by a negative sign, we change the signs of every term inside it. Then combine like terms to get the final answer:

y^3-6y^2+5y - (2y^2-3y-5)=\\=y^3-6y^2+5y-2y^2+3y+5=\\=y^3-6y^2-2y^2+5y+3y+5=\\=y^3-8y^2+8y+5

Which is the last option shown in the question

3 0
3 years ago
Help ASAP!!!!!!!!!!!!!!!
Advocard [28]
Answers D. and E. are correct.
I think that B might also be correct, I hope This helps.
7 0
3 years ago
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