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Alex777 [14]
3 years ago
9

Given . f(x) = 3x2 + 4x – 30 find f (4) Show your work on the sketch pad below.

Mathematics
1 answer:
weeeeeb [17]3 years ago
4 0

Answer:

Step-by-step explanation:

f(4) = 3*(4)^2 + 4*(4) -30

f(4)=48 + 16 -30

=34

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What is 49 divideed by 21
anygoal [31]

Answer:

2.3

Step-by-step explanation:

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3 years ago
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irina [24]

Answer:

\boxed{-3(x+3)(x^2-6x+10)}

Step-by-step explanation:

Hello,

As the polynomial has only real coefficients, it means that 3-i is a zero too, because we apply the Conjugate Zeros Theorem.

It means that we can write the expression as below, k being a real number that we will have to identify.

k(x+3)(x-3-i)(x-3+i)=k(x+3)((x-3)^2-i^2)\\\\=k(x+3)(x^2-6x+9+1)\\\\=k(x+3)(x^2-6x+10)

And for x = 0, y = -90 so we can write

-90=k*3*10, meaning that k=-3

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

5 0
3 years ago
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<span>six hundred and four hundred thirteen thousandths =
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4 0
3 years ago
Find the value of x. You must show all your work.
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How many different triangles can be constructed with three angles, each measuring 30°?
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Okay to have a complete triangle with 3 angles  it must add up to 180° So therefore if you have  30° For each angle  which adds up too 90°. We're are still missing 90 more degrees. So that means we can't  make a triangle at all.
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