With x square - X-1 = 0, find the value of the algebraic formula - X Cubic power + 2x square + 2009 X = how many

With x square - X-1 = 0, find the value of the algebraic formula - X Cubic power + 2x square + 2009 X = how many

x^2-x-1=0
So x ^ 2 = x + 1
x^3=x*x^2=x(x+1)=x^2+x=(x+1)+x=2x+1
So - x ^ 3 + 2x ^ 2 + 2009
=-(2x+1)+2(x+1)+2009
=-2x-1+2x+2+2009
=2010

If the square root of a positive number is 2x + 1 and X-7, what is the square root of x2-2x + 3?

From the meaning of the title: 2x + 1 + X-7 = 0,
The solution is: x = 2,
∴x2-2x+3=3，
The square root is ±
3．

If the square root of a positive number is 2x + 1 and X-7, then the positive number is () A. 5 B. 10 C. 25 D. ±25

The square root of a positive number is 2x + 1 and X-7,
∴2x+1+x-7=0
x=2，
2x+1=5
（2x+1）2=52=25，
Therefore, C

Given that two square roots of a positive number are 1-2x and X-5 respectively, find the positive number

The two square roots of positive numbers are opposite to each other, so the sum is 0
1-2x+x-5=0
-x=4
x=-4
Explain that the two square roots are 9 and - 9
This number is 9 or - 9 squared to 81

If the square root of a positive number is x + 3 and 2x-6, then the positive number is______ .

According to the meaning of the title, x + 3 + 2x-6 = 0,
The solution is: x = 1,
The square roots of positive numbers are 4 and - 4,
Then the positive number is 16
So the answer is: 16

If the square root of a positive number a is 2x-3 and 3x-7, find a positive number a Hurry up

Two square roots of a positive number a are opposite numbers
So 2x-3 = - (3x-7) = - 3x + 7
X=2
a=(2X-3)²=(1)²=1

If the square of (x-1) is equal to 2, what is the value of the square of x minus 2x plus 5?

The square of x minus 2x plus 5
=x²-2x+1+4
=(x-1)²+4
=0+4
=4

Given that the square of x plus the square of Y minus 2x plus 2 y is equal to minus 2, we can find the value of the algebraic formula X of 2008 plus the power of y of 2009

x^2+y^2-2x+2y=-2
x^2+y^2-2x+2y+2=0
(x-1)^2+(y+1)^2=0
x=1,y=-1
x^2008+y^2009=0

Given that the square of x minus x minus 1 is equal to 0, find the value of the cubic minus 2x plus 2012 of the algebraic formula X

x^2-x-1=0
x(x-1)=1
x^3-2x+2012
=x(x^2-1)-x+2012
=x(x-1)(x+1)-x+2012
=x+1-x+2012
=2013

X-Y is known= 3. Find the value of the algebraic expression (x + 1) 2-2x + y (y-2x)

∵x-y=
3，
∴（x+1）2-2x+y（y-2x）
=x2+2x+1-2x+y2-2xy
=x2+y2-2xy+1
=（x-y）2+1
=（
3）2+1
=3+1
=4．