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alexandr1967 [171]
3 years ago
7

How do you factorize (x-2) ^2-(x+3)^2?​

Mathematics
1 answer:
vaieri [72.5K]3 years ago
4 0

Answer:

x^2-4x+4-(x^2+6x+9)

Step-by-step explanation:

=x^2-4x+4-x^2-6x-9

=-10x - 5

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Here is an equilateral triangle. The length of each side is units. A height is drawn. In an equilateral triangle, a line drawn f
Temka [501]

1. Height of the equilateral triangle is: √3 units

2. Area of the equilateral triangle = √3 units²

3. Area = √3/4 x², when each side is x.

<h3>What is an Equilateral Triangle?</h3>

A triangle that has all its three sides equal in length, is referred to as an equilateral triangle.

1. Given the each side measures 2 units, and h is the height, applying the Pythagorean theorem, we would have:

h = √(2² - 1²)

h = √(4 - 1)

h = √3

2. Area of the equilateral triangle = 1/2bh = 1/2(2)(√3)

Area of the equilateral triangle = √3 units²

3. If x is the side length of the equilateral triangle, we would have:

height (h) = √[x² - (x/2)²] = √[x² - x²/4] = √(3x²/4) = √3/2x

Area = 1/2bh = 1/2(x)(√3/2x) = √3/4 x²

Learn more about equilateral triangle on:

brainly.com/question/15294703

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3 0
1 year ago
Valeria has a new beaded necklace. 18 out of the 20 beads on the necklace are blue. What percentage of beads on Valeria's neckla
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3 years ago
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This is 6th grade math please help me!! ​
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3 years ago
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Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.02 margin of er
Brrunno [24]

Answer: 2172

Step-by-step explanation:

Formula to find the sample size n , if the prior estimate of the population proportion(p) is known:

n= p(1-p)(\dfrac{z^*}{E})^2 , where E=  margin of error and z* = Critical z-value.

Let p be the population proportion of adults have consulted fortune tellers.

As per given , we have

p= 0.20

E= 0.02

From z-table , the z-value corresponding to 98% confidence interval = z*=2.33

Then, the required sample size will be :

n= 0.20(1-0.20)(\dfrac{2.33}{0.02})^2

n= 0.20(0.80)(116.5)^2

n= 2171.56\approx2172

Hence, the required sample size = 2172

3 0
2 years ago
In the expression 12a + 5, identify the coefficient. MARKING BRAINLIST!
Allushta [10]

Answer:

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Step-by-step explanation:

The coefficient is the number that comes before variables. In this case, there is only one variable so it is 12.

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