Given that a satisfies | 2007-a | + A-2008 = a, then the value of A-2007 ^ 2 is

Given that a satisfies | 2007-a | + A-2008 = a, then the value of A-2007 ^ 2 is

Because the number in the root sign is greater than or equal to 0, so a - 2008 ≥ 0, so a ≥ 2008, so | 2007 - a | = a - 2007, so a - 2007 + √ (a - 2008) = a √ (a - 2008) = 2007a - 2008 = 2007 & # 178; a - 2007 & # 178; = 2008

Given (2010-a) (2007-a) 2008, find the square of (2010-a) + the square of (2007-a)
The beginning is (2010-a) (2007-a) = 2008

Let x = 2007-a, then (x + 3) x = 2008, then
(2010-a)^2+(2007-a)^2=(x+3)^2+x^2=2x^2+6x+9=2(x+3)x+9=2*2008+9=4025

When X-33 is two, it doesn't make any sense

When X-33 = 0, i.e. x = 33, the fraction X-33 two out of three is meaningless

If we know that 1 / 2 of a + a = 5, then 2 / 2 of a + 4 times of a + 2 times of a + 1=
fast

a + 1/a = 5
(a + 1/a)^2 = 25
a^2 + 1/(a^2) = 23
(a^4+a^2+1)/a^2 = a^2 + 1 + 1/(a^2) = 24

If a + 1 / a = 5, then a ^ 2 + 1 / A ^ 2 =?

Solution
a+1/a=5
Square on both sides
(a+1/a)²=25
Namely
a²+2+1/a²=25
∴a²+1/a²=23

(a-b) 2 times * (B-A) 5 times = (1 / 4) 2009 times * 2 of 4019 times
Come on! As long as the answer! Online answer! Good points

(a-b) 2 times * (B-A) 5 times = - (a-b) ^ 7
(1 / 4) 4019 times of 2009 * 2 = 2

(- 1 / 4) - 1 episode + (- 2) 2 episodes * 5 0 episode + (1 / 3) - 2 episodes

(-1/4)^(-1)+(-2)^2*5^0+(1/3)^(-2)
=1/(-1/4)+4*1+1/(1/3)^2
=-4+4+1/(1/9)
=9

The root of the fractional equation X-2 / 2-x 1 = 0 is
A.X=1
B.X=-1
C.X=2
D.X=-2

Double x (X-2)
2x-x+2=0
x=-2
Choose D

The length of the two ropes is 210 meters. If the first rope increases by 13, it will be as long as the second one. If the second rope decreases by 14, it will be as long as the first one. How many meters are the two ropes?

Let the length of the first rope be x meters, and the length of the second rope be 210-x meters. From the meaning of the question, we can get: & nbsp; 13X = (210-x) × 14, & nbsp; 13X = 52.5-14x, 712x = 52.5, & nbsp; X = 90; 210-90 = 120 meters; a: the length of the first rope is 90 meters, and the length of the second rope is 120 meters

The root of the equation x - 2 / 3 = 1 is?

5 / 3