Given the square of X + X-1 = 0, find the square of 3x + 3x + 2

Given the square of X + X-1 = 0, find the square of 3x + 3x + 2

3x^2+3x+2
=3(x^2+x-1)+3+2
=3*0+5
=5

If the square of X - x = 1, find the cube of X + the square of 3x - 5x + 2012

∵x²-x=1
∴x²-x-1=0
x³+3x²-5x+2012
=x(x²-x-1)+4x²-4x+2012
=x(x²-x-1)+4(x²+x-1)+2016
=0+0+2016
=2016

Given (x + a) (x + b) = (x ^ 2) - 13X + 36, then the value of a + B is PS: with solution, x ^ 2 is the square of X

(x+a)(x+b)=x^2+(a+b)x+ab
So a + B = - 13
ab＝36

18: (x-1) = 2:7
It must be solved in proportion

18:(X-1)=2:7
2(x-1)=18*7
2x-2=126
2x=128
x=64

Today is Friday. What day is the 184th day from today?
Yesterday was Wednesday. What day is the 100th day from today?
Today is Tuesday. What day is the 150th day from tomorrow?
Find three answers + formula

Today is Friday, from today, the 184th day is what day? 184 △ 7 = 26 weeks. 2 days, so the 184th day is Sunday, yesterday is Wednesday, from today, the 100th day is what day? Yesterday is Wednesday, so today is Thursday, 100 △ 7 = 14 weeks. 2 days, the 100th day is Saturday, today is Tuesday, from tomorrow

How to solve the two equations 45x + 15 = Y60 (x-1) = y?
To be more specific, write out the whole process of solving the equation

Solution
①45X+15=Y
②60(X-1)=Y
Bring (2) into (1)
Then: 45x + 15 = 60x-60
75=15X
X=5
Take x = 5 into 2
60*4=Y
Y=240

The equation "y = 4x, 5 / x + 30 / x = 25" is used to solve it
A square table consists of one table top and four legs. If one cubic meter of wood can be used to make five tables or 30 legs of a square table, and now there are 25 cubic meters of wood, how much wood can be used to make the table top and legs, and how many square tables can be made?
The equation "y = 4x, 5 / x + 30 / x = 25" is used to solve it

5 x + 30 x = 25
(1 / 5 + 1 / 30) x = 25
7x of 30 = 25
X = 750 / 7

There are 24 cars and motorcycles in a parking lot, including 4 wheels for cars and 3 wheels for motorcycles. There are 86 wheels for these cars. How many motorcycles are there?

Suppose there are x cars and (24-x) motorcycles
4x+3（24-x）=86
4x+72-3x=86
x=14
24-x=10
A: there are 14 cars and 10 motorcycles

X + 2Y + 3Z = 14 3x + y + 2Z = 11 2x + 3Y + Z = 11 answer,

The three formulas are added left and right respectively
We can get: x + y + Z = 6
Watch carefully
Available
x=1
y=2
z=3
It's over

Note: forget to write the solution+
(1) The perimeter of an equilateral triangle is 3.24 meters. One side is x meters
(2) The base of an isosceles triangle is 17.5 meters longer than a waist, and the degree of its vertex angle is four times that of a base. Base: 41.5 cm. Waist: xcm
The degree of the top corner: 120 degrees. The degree of the bottom two corners: y degrees
(3) Waiter: give you 2.5 yuan. Customer: I paid: 20 yuan. (chocolate x yuan each.)
(4) Mom: ten apples in all. Child: X apples for grandma. (there are six apples on the table.)

(1) 3x = 3.14 x = 1.08 M
(2) 120 ° = 4Y y = 30 ° from cos30 ° = √ 3 / 2 to get (√ 3) x / 2 + (√ 3) x / 2 = 41.5 x = 83 √ 3 / 6 cm
(3) X = 20-2.5 x = 17.5 yuan
(4) 10-x = 6 x = 4