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wolverine [178]
2 years ago
15

Determine the roots of p(x)=3(x+1)^4-5(x+1)^2+1"Show your work"

Mathematics
1 answer:
vaieri [72.5K]2 years ago
3 0
p(x)=3(x+1)^4-5(x+1)^2+1=3\left[(x+1)^2\right]^2-5(x+1)^2+1\\\\\text{subtitute:}\ (x+1)^2=t\geq0

p(t)=3t^2-5t+1\\\\p(t)=0\iff3t^2-5t+1=0\\\\a=3;\ b=-5;\ c=1\\\\\Delta=b^2-4ac\to\Delta=(-5)^2-4\cdot3\cdot1=25-12=13 > 0\\\\\sqrt\Delta=\sqrt{13}\\\\x_1=\dfrac{-b-\sqrt\Delta}{2a};\ x_2=\dfrac{-b+\sqrt\Delta}{2a}\\\\x_1=\dfrac{-(-5)-\sqrt{13}}{2\cdot3}=\dfrac{5-\sqrt{13}}{6} > 0\\\\x_2=\dfrac{-(-5)+\sqrt{13}}{2\cdot3}=\dfrac{5+\sqrt{13}}{6} > 0

(x+1)^2=\dfrac{5-\sqrt{13}}{6}\ \vee\ (x+1)^2=\dfrac{5+\sqrt{13}}{6}\\\\x+1=\pm\sqrt{\dfrac{5-\sqrt{13}}{6}}\ \vee\ x+1=\pm\sqrt{\dfrac{5+\sqrt{13}}{6}}

Answer:\\\\\boxed{x\in\left\{-\sqrt{\dfrac{5-\sqrt{13}}{6}}-1;\ -\sqrt{\dfrac{5+\sqrt{13}}{6}}-1;\ \sqrt{\dfrac{5-\sqrt{13}}{6}}-1;\ \sqrt{\dfrac{5+\sqrt{13}}{6}}-1\right\}}


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2783 and 7283. The value of 2 in ____ is ____times the value of 2 in_____.
Orlov [11]
The value of 2 in <em>2783</em> is <em>10</em> time the value of 2 in <em>7283</em>.
6 0
2 years ago
What is 0.0578 in scientific notation?
Andre45 [30]

Answer:

5.78 x 10^-2

Step-by-step explanation:

move the desimal over till it looks like 1.00 count places moved left=negitive, right=positive

3 0
3 years ago
When they are both racing on hoverboards, Victoria is 3 times as fast as her brother Max. When she is on foot, she is 3 times sl
NARA [144]

Answer:

Race completed in 48 minutes.

Step-by-step explanation:

Let the speed of Max on hoverboard is = x

Then as per question speed of Victoria on hoverboard = 3x

Now it has been given in the question that speed of Victoria on foot is 1/3 of the speed of Max on hoverboard that will be = x/3

Now we will form the equation.

As we know the formula speed = distance/time

Let the time taken by both to complete the race be t minutes.

Distance covered by Victoria in 12 minutes + Distance covered by Victoria on foot = distance covered by Max on hoverboard

Then the equation will be

12(3x)+(1/3)x(t-12)=xt

36x+\frac{xt}{3}-4x=xt

x(36+\frac{t}{3}-4)=xt

36+\frac{t}{3}-4=t

32=t-\frac{t}{3}

\frac{2t}{3}=32

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4 0
2 years ago
Read 2 more answers
List the single-digit divisors of 2100.<br> I really need help
liberstina [14]

Answer:

  • 1, 2, 3, 4, 5, 6, 7

Step-by-step explanation:

<u>Prime factors of 2100 are:</u>

  • 2100 = 2*2*3*5*5*7

<u>The single-digit divisors are:</u>

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<u>Another solution is you divide 2100 by all numbers 1 through 9 and list those divisible:</u>

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  • 2100/6 = 350, yes
  • 2100/7 = 300, yes
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  • 2100/9 = 233.33, no

So all the numbers from 1 to 7

5 0
3 years ago
Suppose the first term of a geometric sequence is multiplied by a nonzero constant, c. What happens to the following terms in th
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The next  terms in the sequence will be multiplied by c, but the common ratio is still the same

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S = [1(3)^4 - 1]/ [3-1]  = 80/2 - 40

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3 years ago
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