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Nat2105 [25]
3 years ago
13

3{x}^{4}-15{x}^{2}+12=0

Mathematics
1 answer:
MA_775_DIABLO [31]3 years ago
6 0

3x^4-15x^2+12=0\qquad|:3\\\\x^4-5x^2+4=0\\\\x^4-x^2-4x^2+4=0\\\\x^2(x^2-1)-4(x^2-1)=0\\\\(x^2-1)(x^2-4)+0\iff x^2-1=0\ \vee\ x^2-4=0\\\\x^2=1\ \vee\ x^2=4\\\\x=\pm\sqrt1\ \vee\ x=\pm\sqrt4\\\\\boxed{x=-1\ \vee\ x=1\ \vee\ x=-2\ \vee\ x=2}

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professor190 [17]
The entire circle has a central angle of 360°.
Because the radius is 6 mi, the area of the circle is
π(6)² = 36π mi².

The sector has a central angle of 60°, therefore it occupies 60/360 = 1/6 of the area of the circle.
The area of the sector is
(1/6)*36π = 6π mi² = 18.85 mi²

Answer: 6π mi²  or  18.85 mi².

8 0
4 years ago
How to do a property eqaution
Ymorist [56]

This makes no sense, not enough information is provided.

6 0
3 years ago
Read 2 more answers
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QveST [7]

Answer:

13500

Step-by-step explanation:

to answer this question

  1. convert the dimensions of the field to foot
  2. find the area of the field
  3. divide the area by the space of each egg

1 yard = 3 foot

75 yards = 75 x 3 = 225

120 yards = 120 x 3 = 360 ft

Area of a rectangle = length x width

225 x 360 = 81,000 ft^2

Maximum number of eggs = Area of the field / space the eggs must be apart

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3 0
3 years ago
Factor the expression. If the expression cannot be factored, say so.
tino4ka555 [31]
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8 0
4 years ago
X+y+z=1<br> 2x+4y+2z=-6<br> -X+9y-3z=-49<br> How can I solve this system of equations?
masya89 [10]

Answer:

Step-by-step explanation:

x + y + z = 1

-x + 9y - 3z = -49

10y - 2z = -48

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2y = -8

y = -4

10(-4) - 2z = -48

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-2z = -8

z = 4

x - 4 + 4 = 1

x = 1

x = 1, y = -4, z = 4

8 0
3 years ago
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