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sveticcg [70]
3 years ago
13

How to factor by grouping to factor 4x^3+12^2-9x-27

Mathematics
2 answers:
RoseWind [281]3 years ago
5 0
<span>4x³+12x²-9x-27
4x²(x)+4x²(3)-9(x)-9(3)
4x²(x+3)-9(x+3)
(4x²-9)(x+3)
(2x-3)(2x+3)(x+3)

</span>
alisha [4.7K]3 years ago
4 0
4x³ + 12x² - 9x - 27
4x²(x) - 4x²(3) + 9(x) - 9(3)
4x²(x - 3) + 9(x - 3)
(4x² + 9)(x - 3)
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The triangle below is equilateral. Find the length of side x in simplest radical form with a rational denominator.
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hi

As the triangle is  equilateral, the height is also the median.

As the median cut the side in two equal halve, and one of this half is 9, then the side is 18.  

As the triangle is equilateral, every side is the same measure, so x = 18

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3 years ago
The radius of the sphere is 10 units. What is the approximate volume of the sphere? Use and round to the nearest whole cubic uni
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Answer:

The approximate volume of the sphere= 4187  cubic units

Step-by-step explanation:

<u>Points to remember</u>

Volume of sphere = (4/3)πr³

Where 'r' radius of sphere

<u>To find the volume of sphere</u>

It is given that the radius of the sphere is 10 units. ,

Here radius r = 10 units

Volume =  (4/3)πr³

 =  (4/3) * 3.14 * 10³

 =  (4/3) * 3140

 =  4186.666 ≈  4187  cubic units

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2 A town park has two biking trails. Marsh Trail is 5 miles long. Woodland Trail is
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25/10

Step-by-step explanation:

Make the fractions improper by multiplying the whole number by the denominator and then adding the numerator (if this makes sense).

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53/10-28/10=25/10, which can be then simplified into 2 1/2 or 5/2.

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