Teacher. (2x - 2) (x - 1) = 0. The general form is. 2x & # 178; - 2x - 2 = 0

Teacher. (2x - 2) (x - 1) = 0. The general form is. 2x & # 178; - 2x - 2 = 0

That's not right
（2x - 2）（x-1）=0
2x²-2x-2x+2=0
2x²-4x+2=0
x²-2x+1=0

To solve (a problem) with a linear equation of one variable
When the wind speed is 10km / h and the speed of the aircraft is 250km / h in the upwind, the speed of the aircraft in the downwind is ()

Let the speed of no wind be X
So the windless speed - the wind speed is the headwind speed
X-10=250
So x = 260km / h
So the downwind speed is
260+10=270KM/H

Super simple mathematical problems in grade one of junior high school
(1) When a is equal to?, the difference between the value of algebraic formula 3 (A-1) and the value of 4A + 3 is 2
(2) What is the result of merging 4z-1.5z-2 (2.5z-1)?
A.2-2.5Z B.2.5Z-2 C.2.5Z+2 D.1-3Z

(1)
3(a-1)-(4a+3)=±2
3a-3-4a-3=±2
-a-6=±2
So a = - 8 or a = - 4
(2)
4Z-1.5Z-2(2.5Z-1)
=4Z-1.5Z-5Z+2
=-2.5Z+2
=2-2.5Z
The answer is a

If (M-3) x2 | m | - 5-4m = 0 is a linear equation of one variable with respect to x, find the value of the algebraic formula m2-2m + 1m

According to the characteristics of one variable linear equation, m − 3 ≠ 02 | m | - 5 = 1, M = - 3. When m = - 3, m2-2m + 1m = 9 + 6-13 = 1423