Square of 2K + 4k-7 = 0

Square of 2K + 4k-7 = 0

(- 4 + 6 radical 2) / 4

Solve the equation (K + 1) x & # 178; - (K & # 178; + 3K) x + (K & # 178; - 1) = 0

（k+1）x²-（k²+3k）x+（k²-1）=0
[（k+1）x+（k-1）][x+（k+1）]=0
x1=（k-1）/（k+1）
x2=-k-1

K & # 178; - 3K + 2 = 2 and K ≠ 3,

k=0

K & # 178; - 4K + quarter k-1 △ K & # 178; - quarter 1-k solution

This is very simple
K-4 K + 4 is (K-2) K-4 is (K + 2) (K-2) and then it's simple

Given that m and N are reciprocal, a and B are opposite (B ≠ 0), and | x | = 3, find the value of the algebraic formula (a + B + Mn) + B / a △ X
Format to be accurate, what can be obtained by the title

∵ m, n are reciprocal to each other
∴mn=1
And ∵ A and B are opposite to each other
∴a+b=0,b/a=-1
∵|x|=3
Ψ x = 3 or x = - 3
When x = 3, the original formula = (0 + 1) + (- 1) + 3
=1-1÷3
=2/3
When x = - 3, the original formula = (0 + 1) + (- 1) + (- 3)
=1+1/3
=4/3

Given that a and B are opposite to each other, m and N are reciprocal to each other, and C is the largest negative integer, then the value of algebraic formula 2 (a + b) + mn-3c is

A. B is opposite to each other, a + B = 0
M. N is reciprocal to each other, Mn = 1
C is the largest negative integer, C = - 1
2（A+B）+MN-3C
=2X0+1-3X（-1）
=4

It is known that A. B is opposite to each other, C. D is reciprocal to each other, and that x = 2, y = 1, X

a. B is opposite to each other
∴a+b=0
c. D is reciprocal to each other
∴cd=1
│x│=2,y=1,x

a. B is opposite to each other, C and D are reciprocal to each other, | x | = 2, y = 1, X

a. B is opposite to each other, a + B = 0
c. D is reciprocal, CD = 1
|x|=2,y=1,x

1. Given {x + 1} + [2y-4] = 0, find the square of the algebraic formula X - XY + Y! 2. Given that a and B are reciprocal, m and N are opposite, find [M + n]
Go on. Find the value of 2009 power of [M + n] - A.B~

1. Because {x + 1} + [2y-4] = 0
So x + 1 = 0, 2y-4 = 0
That is: x = - 1, y = 2
Algebraic formula: (- 1) (- 1) - 2 + 2 * 2 = 1 + 2 + 4
=7
2. A and B are reciprocal, that is ab = 1
m. N is the opposite number, that is, M + n = 0
【m+n】*2009-AB=0-1=-1

If AB is opposite to each other, AB is not zero, XY is reciprocal to each other, and the absolute value of M is 3, find x + xym + 1 + a of (a + b) y part

±3