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zzz [600]
3 years ago
15

X^2 - 4 Find the roots

Mathematics
1 answer:
charle [14.2K]3 years ago
8 0
Write the polynomial as an equation.
y=x^2-4

To find the roots of the equation, replace y with 0 and solve.
0=x^2-4

Replace y with 0 and solve for x
X^2-4=0

Add 4 to both sides of the equation
X^2=4

Take the square root of both sides of the equation to eliminate the exponent on the left side.
X= ±√4

The complete solution is the result of both the positive and negative portions of the solution.
X=2,-2

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Find the value of the missing side. Round your answer to the nearest hundredth
irina [24]

Answer:

let, missing angle be x,

in right angle triangle

h²=p²+b²

x²=12²+16²

x²=144+256

x=√400

x=20

hope it helps.

4 0
3 years ago
Help me please!
telo118 [61]

Answer:

f^{-1}(6) = 50

Step-by-step explanation:

Given

f(x) = \sqrt{2x} - 4

Required

Find f^{-1}(6)

First, we calculate the inverse function

f(x) = \sqrt{2x} - 4

Express f(x) as y

y = \sqrt{2x} - 4

Swap the positions of x and y

x = \sqrt{2y} - 4

Solve for y: Add 4 to both sides

4 + x = \sqrt{2y} - 4+4

4 + x = \sqrt{2y}

Square both sides

(4 + x)^2 = 2y

Divide both sides by 2

y = \frac{(4 + x)^2}{2}

Express y as an inverse function

f^{-1}(x) = \frac{(4 + x)^2}{2}

Next, solve for: f^{-1}(6)

Substitute 6 for x

f^{-1}(6) = \frac{(4 + 6)^2}{2}

f^{-1}(6) = \frac{(10)^2}{2}

f^{-1}(6) = \frac{100}{2}

f^{-1}(6) = 50

7 0
3 years ago
A flea weighs 8 decigrams, and an ant weighs 3 milligrams. How much more does a flea weigh than an ant?
Flauer [41]
1 decigram is 100 milligrams so the flea weighs 800 milligrams and 800-3=797 so the flea weighs 727 milligrams more than the ant
8 0
4 years ago
Read 2 more answers
The value of a bike depreciates by 20% each year<br> why after 2 years is it not reduced by 40%?
nordsb [41]
Because it will not be 40 percent of the original, since after 20 percent is gone, the next year itll be 20 percent of the product, instead of the original, so for example, if it was 100, it would go down to 80, and then the next year it would be 20 percent of 80, not 100
4 0
3 years ago
Read 2 more answers
A toy store is ordering 3,000 remote control cars. The store can order the cars in sets of 10. How many sets of 10 does the stor
kirza4 [7]
If the store can only buy them in bulks of ten, then you take your number of desired cars (3,000) and divide it by the bulk amount (10) and it will give you your amount of bulk you need to buy to fulfill your desired amount of product (300). Simplified, you take your cars that they want, divide it by how many come in a set, and the answer will be how many sets they need to order. You need to use both the amount of desired cars and number of cars in a set as you primary information to solve this problem. Hope this helped!
3 0
3 years ago
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