x³-3x²-10x=0

x³-3x²-10x=0

x³-3x²-10x=0
x(x²-3x-10)=0
x(x-5)(x+2)=0
x1=0,x2=5,x3=-2

Aunt Wang will deposit 1000 yuan into the bank for a fixed period of one year, with an annual interest rate of 3.50%. After the maturity, how much interest will Aunt Wang get?

Hello, landlord
Interest: 1000 × 1 × 3.5% = 35 yuan
Sum of principal and interest: 1000 + 35 = 1035 yuan
A: Aunt Wang gets 35 yuan interest
Hope to help you, do not understand, please ask

1. It is known that the ratio of the lengths of three sides of a triangle is 4:5:6, and the difference between the largest side and the smallest side is 8 cm, then the lengths of three sides of the triangle are ()
2. If there are two equal sides on three sides of a triangle, and the lengths of the two sides are a and B, and | A-4 | + (B-6) & sup2; = 0, then the perimeter of the triangle is ()
3. As shown in the figure, an equilateral triangle can be divided into four triangles by taking the middle points of each side and connecting them in turn. The second time, the four triangles can be divided into 16 triangles by taking the middle points of each side and connecting them in turn. In this way, the number of triangles divided into n times is ()
4. The circumference of △ ABC is 36cm, a + B = 2c, a: B = 1:2, find the length of a, B, C

1. It is known that the ratio of the lengths of three sides of a triangle is 4:5:6, and the difference between the largest side and the smallest side is 8 cm, then the lengths of three sides of the triangle are (16 cm, 20 cm, 24 cm)
2. If there are two equal sides on three sides of a triangle, and the lengths of both sides are a and B, and | A-4 | + (B-6) & sup2; = 0, then the perimeter of the triangle is (4 + 4 + 6 = 14 or 4 + 6 + 6 = 16)
3. As shown in the figure, an equilateral triangle can be divided into four triangles by taking the middle points of each side and connecting them in turn. The second time, the four triangles can be divided into 16 triangles by taking the middle points of each side and connecting them in turn. In this way, the number of triangles for the nth time is (4 ^ n)
4. The circumference of △ ABC is 36cm, a + B = 2c, a: B = 1:2, find the length of a, B, C
a=8 b=16 c=12
Write an answer later

Using undetermined coefficient method to find general term formula
A (1) = - 3 A (n) = 2A (n-1) - 3 (n ≥ 2)
Find a (n) (brackets denote subscript)

Let a (n) + x = 2 [a (n-1) + x]
X = - 3
So the original formula can be changed to a (n) - 3 = 2 [a (n-1) - 3]
The sequence a (n) - 3 is equal ratio sequence
Substituting a (1) = 3 gives a (2) = 3
When n > = 2, a (n) = the (n-1) power of 3 * 2 + 3
When n = 1, a (1) = 3

How to calculate frequency in mathematics

Frequency is probability. Divide frequency by total. Frequency is the number of occurrences

A simple calculation of 205 × 13-1890 △ 18

205×13－1890÷18
=(200+5)×13-(1800+90)÷18
=2600+65-100-5
=2560

How many days does it take for Party B to complete the project alone

1 ÷ (1 / 6-1 / 18) work efficiency of a project divided by Party B = time for Party B to complete alone

What is 8 minus 2 divided by 2?

It's 8-1, it's 7

Mathematics problems and engineering problems in Junior Three
In the process of road reconstruction in a city, it is necessary to lay a road with a length of 1000 meters. It is decided that two engineering teams of Party A and Party B will complete the project
(the first question has been worked out that a completes 70 meters a day, and B completes 50 meters a day)
Q: if the construction period of the project is required to be no more than 10 days, how many plans are there for the two engineering teams to allocate the quantities (in whole 100 meters)

If y meters are allocated to engineering team a, then (1000-y) meters are allocated to engineering team B
From the meaning of the title, we get (1) y / 70

3 out of 13 times 3 out of 37 equals 26 out of 37?

3/13*3*26/37
=18/37