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Over [174]
3 years ago
9

Expand and simplify(3x+2)^2-(2x-1)^2

Mathematics
1 answer:
MAXImum [283]3 years ago
8 0
If you would like to calculate (3 * x + 2)^2 - (2 * x - 1)^2, you can do this using the following steps:

(3 * x + 2)^2 - (2 * x - 1)^2 =
9 * x^2 + 12 * x + 4 - (4 * x^2 - 4 * x + 1) =
9 * x^2 + 12 * x + 4 - 4 * x^2 + 4 * x - 1 = 
5 * x^2 + 16 * x + 3

The result is 5 * x^2 + 16 * x + 3.
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Describe the shape of the distribution below.
Ahat [919]
The distribution is approximately symmetrical
3 0
3 years ago
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Use forward or backward substitute to conjecture a closed formula which describes the nth term of the sequence an = an-1 – n, wh
WINSTONCH [101]
The closed formula for  <span>an = an-1 – n will be found using the formula for arithmetic sequence given by:
an=a+d(n-1)
where
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From the formula given:
a=4
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7 0
3 years ago
The perimeter of the triangle below is 8x - 6.
Vikentia [17]

Answer:

QR = 4x - 6

Step-by-step explanation:

A triangle is a polygon that has three sides and three angles. There are different types of triangles such as equilateral triangle, isosceles triangle, scalene triangle, right angled triangle.

The perimeter of a triangle is a measure of the length of the sides. It is the sum of all the length of the three sides of the triangle.

From the question:

Perimeter of triangle PQR = PQ + PR + QR

But PR = 3x - 1, PQ = x + 1, Perimeter of PQR = 8x - 6.

Therefore substituting gives:

8x - 6 = (x + 1) + (3x - 1) + QR

8x - 6 = (x + 3x + 1 - 1) + QR

8x - 6 = 4x + QR

QR = (8x - 6) - 4x

QR = 4x - 6

6 0
3 years ago
The question is in picture the picture provided<br> pls help and don't troll
jeyben [28]

John sold 30U

Rick sold 25U

So, Rick sold 5 fewer units than John.

Hope that helps.

7 0
3 years ago
I need helps someone
UNO [17]
A is the correct answer
7 0
3 years ago
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