3 years ago

Which is a factored form of the polynomial x^2+9x+20

Mathematics

1 answer:

ipn [44]3 years ago

8 0

Answer:

(x + 4)(x + 5)

Step-by-step explanation:

The given equation in the form of polynomial is:

Factorizing the above given equation, we get

Taking x+5 common, we have

which is the required factorised form.

Therefore the factors of the given polynomial are .

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F(x)=2x+3/4x+5 find f(-9)<br><br>pls solve it

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Answer:

15/31

Step-by-step explanation:

substitute -9 were there's x in the function

f(-9)=2(-9)+3/4(-9)+5

=-18+3/-36+5

=-15/-31

the negatives cancel giving you

15/31

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Answer:

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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3 years ago

How did he get this 1/2i ? I dont remember studying this definition in calc 1 neither calc 2!

Hitman42 [59]

The $i$ in the denominator is missing in the second expression. It should be

$\sin at=\dfrac{e^{iat}-e^{-iat}}{2i}$

This follows from

$e^{iat}=\cos at+i\sin at$
$e^{-iat}=\cos at-i\sin at$
$\implies e^{iat}-e^{-iat}=2i\sin at$
$\implies \sin at=\dfrac{e^{iat}-e^{-iat}}{2i}$

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4 years ago