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3 years ago

Solve (x^2+4)(x^2-4)

Mathematics

2 answers:

timurjin [86]3 years ago

3 0

(x^2+4)(x-2)(x+2)orx^4 - 16

wolverine [178]3 years ago

3 0

If you need to expand, you multiply all the terms:

x^2 * x^2 = x^4
x^2 * -4 = -4x^2
4 * x^2 = 4x^2
4 * -4 = -16

And then combine:

x^4 - 4x^2 + 4x^2 - 16

Which becomes:

x^2 - 16

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the height of a ball thrown directly up with a velocity of 40 feet per second from a initial height of 5 ft is given by the equa

vovikov84 [41]

The equation is h=-16t²+40t+5.The ball will hit the ground when h=0. So:
0=-16t²+40t+5
16t²-40t-5=0
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8 0

3 years ago

Flying with the wind a plane went 386 km/h. Flying into the same wind the plane only went 318 km/h. find the speed of the plane

zysi [14]

Answer:

Speed of plane in air is 352 km/hr and speed of wind is 34 km/hr

Step-by-step explanation:

Average speed of plane in with wind = 386 km/h

Average speed of plane against wind = 318 km/hr

Consider the speed of plane in wind be x km/hr and speed of plane against wind be y km/hr

As such speed of plane in wind would be x + y km/hr and speed of plane against wind would be x - y km/hr. i.e

x+y = 386

x-y = 318

by solving these two equation, we get

2x=704

x= 352 km/hr

y=386 - 352

y= 34 km/hr

Hence, Speed of plane in air is 352 km/hr and speed of wind is 34 km/hr

5 0

4 years ago

Describe how you use algebra tiles to model the equation 4×=20

Elza [17]

You use 20 tiles in 4 rows

3 0

3 years ago

A company is worth $79,600,000. Write this number in scientific notation. 79,600,000=

Alina [70]

Answer:

The answer is 7.96×10⁷ .

Step-by-step explanation:

As the decimal moves to the left , you have to add one more power to the base 10 :

e.g

7 960 000.0 = 7 960 000×10¹

796 000.00 = 796 000×10²

79 600.000 = 79 600×10³

7 960.0000 = 7 960×10⁴

796.00000 = 796×10⁵

79.600000 = 79.6×10⁶

7.9600000 = 7.96×10⁷

* Take note :

$a \times {10}^{n}$

0 < a < 10 ('a' must be greater than 0 but smaller than 10)

6 0

3 years ago

A container holds 8 gallons of water. It begins leaking at a constant rate. After 16 minutes the container has 6 gallons of wate

tangare [24]

In that 16 minutes, the amount that leaks out is (8 - 6) = 2 gallons.

The average unit rate of the leak is

(2 gal)/(16 min) = (2/16) (gal/min) = 1/8 gal/min

= 16 fluid ounce per min

= 4/15 fl oz per second

4 0

3 years ago

Read 2 more answers