If x = 5 times the root sign 3 + 2, find the value of the algebraic expression x square - 4x + 6

If x = 5 times the root sign 3 + 2, find the value of the algebraic expression x square - 4x + 6

x^2-4x+6
=(5gen3+2)^2-4(5gen3+2)+6
=79+20gen3-20gen3-8+6
=77

The value of the square - 4x + 2 of the algebraic expression x when x = 2 + radical 3

x=2+√3
x²-4x+2
=(x²-4x+4)-4+2
=(x-2)²-2
=(2-2+√3)²-2
=3-2
=1

Given that x = 2 + 1 / 1 of the radical, find the value of the square - 4x + 4 of the algebraic formula 3-radical X,

It is known that x = root 2 + 1 / 1,
x=1/(√2+1)
x=√2-1
The square of the algebraic formula 3-radical x-4x + 4
=3-√(x-2)^2
=3-(2-x)
=1+x
=1+√2-1
=√2

One hundred simplified problems of the second mathematics root in junior high school The more the better, the faster the better, within 24 hours

Root number 126 root No. 9 root No. 6 root No. 4 root No. 1 root No. 0 root No. 25 root No. 16 root No. 36 root No. 49 root No. 64 root No. 81 root No. 121 root No. 196 root No. 169 root No. 100 root No. 1000 root No. 200 root No. 1 root No. 88 root No. 82 root No. 84 root No. 96 root No. 124 root No. 128 root No. 256 root No. 451

Simplification: cube of root 4 x + square of 12 x

The cube of root 4 x + the square of 12 x
=2|x|√(x+3)

b. C is the three sides of △ ABC, (1) simplification: | a-b-c | + the square of (a + B-C) under the radical sign (2) let a be a

1. A, B, C are the three sides of △ ABC
AC
|a-b-c |+√（a+b-c）^2
=b+c-a+a+b-c
=2b
2. Suppose a

Reduction of the square of 5Y / 2x times root 1 / Y - X / y cube (Y > x > 0)

The square root of the (2x-y / y) of the (2x-y / y) / 5 times the square root of the (2x-y / y) sign=

First simplify and then evaluate: the square of x-2x + the cube-x of 1 / x times (x-1), where x = root 2-1

[(x^3-x)/(x^2-2x+1)]*(x-1)/x
=[x(x^2-1)/(x-1)^2]*(x-1)/x
=[x(x-1)(x+1)/(x-1)^2]*(x-1)/x
=x+1
=√2-1+1 …… (because x = √ 2-1)
=√2

Reduction of radical (cube of X + square of 2XY)?

√[x³+(2xy)²]
=√[x³+4x²y²]
=√[x²(x+4y²)]
=|x|√(x+4y²)

Given that the three sides of the triangle ABC are a, B, C, simplify the square of √ (a + B + C) (all in the root sign) + the square of √ (a-b-c) is (all in the root sign) + the square of √ (b-c-a) (.) - (C-A-B) (.)

4C use the sum of the two sides of the triangle to be greater than the third