1 / 2x ^ 2-3x + 4 = 0, please use formula method to solve it,

1 / 2x ^ 2-3x + 4 = 0, please use formula method to solve it,

Δ=3^2-4·1/2·4=1
∴x1=3+1=4
x2=3-1=2
First simplify and multiply by 2 to get X & # 178; - 6x + 8 = 0 (x-4) (X-2) = 0, then x = 2, x = 4, hope to help you
How to solve 2x-3x-2 = 0 by formula method,
2x－3x－2＝0
-2=3x-2x
x=-2
The solution of the system of equations 2x − y = 53x + 4Y = 2 is______ .
2x − y = 5, 1 3x + 4Y = 2, 2, 1 × 4, 8x-4y = 20, 3, 2 + 3, 11x = 22, the solution is x = 2, substituting x = 2 into 1, 2 × 2-y = 5, the solution is y = - 1, so the solution of the equations is x = 2Y = - 1
Mathematical conversion and formula. To primary and secondary school
Such as the title
1. The number of each copy × the number of copies = the total number of copies △ the number of each copy = the total number of copies △ the number of copies = the number of copies 2. 1 times × the number of copies = the number of multiples △ 1 times = the number of multiples △ the number of multiples = the number of multiples △ the number of multiples △ the number of multiples = the number of multiples △ the number of multiples = the number of multiples △ the number of multiples = the number of multiples △ the number of multiples = the
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How to solve 4 / 3x + 2 = 3-1 / 4x
transposition
4/3x+1/4x=3-2
(4/3+1/4)x=1
(19/12)x=1
x=1÷(19/12)
x=12/19
4/3x+2=3-1/4x
4/3x+1/4x＝1
（16+3）x/12＝1
19x/12＝1
x＝12/19
4/3x+2=3-1/4x
16x+24=36-3x
19x=12
x=12/19
Both sides * 12x at the same time, 16 + 24x = 36x-3, x = 19 / 12
4/3x+2=3-1/4x
4/3x+1/4x＝1
（16+3）x/12＝1
19x/12＝1
x＝12/19
Given that the image intersection of the first-order function y = - x + 7 and the positive scale function y = 4x out of 3 intersects with a and intersects with B on the X axis, the coordinates of a and B can be obtained
If it intersects with the X axis, then y = 0
7-x=0,x=7
So point B coordinates (7,0)
7-x=3x/4
7x/4=7
X=4
Substituting y = 3 / 4x, y = 3
So point a coordinates (4,3)
-x+7=4/3x -->x=3,y=4, A=(3,4)
-x+7=0->x=7,y=0,B(7,0)
If the image of the first-order function y = - x + 7 and the positive scale function y = 4x / 3 intersects with a, then - x + 7 = 4 / 3x, the solution is x = 3, y = 4, so the coordinate of a is (3,4)
Let y = 0, the solution is x = 7, so the coordinate of B is (7,0)
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If the image of the first-order function y = - x + 7 and the positive scale function y = 4x / 3 intersects with a, then - x + 7 = 4 / 3x, the solution is x = 3, y = 4, so the coordinate of a is (3,4)
Let y = 0, the solution is x = 7, so the coordinate of B is (7,0)
I'm glad to answer for you. I hope it will help you. If you don't understand, please ask. If you are satisfied, please accept. thank you! Put it away
y=-x+7
y=4x/3
Simultaneous determination of the coordinates of a (3,4)
The intersection point B with the X axis, let y = 0.
B(-7.0)
The intersection of B (7,0) simultaneous equations
a(4,3)
Given a = {x | y = log2 (x + 1)} and B = {y | y = (12) x, x > 0}, then a ∩ B = ()
A. （1，+∞）B. （-1，1）C. （0，+∞）D. （0，1）
From a = {x | y = log2 (x + 1)} = {x | x ＞ - 1} = (- 1, + ∞), B = {y | y = (12) x, X ＞ 0} = {y | 0 ＜ y ＜ 1} = (0,1), so a ∩ B = (- 1, + ∞) ∩ (0,1) = (0,1)
Solving inequality | 3x-2 | ≤ 2x + 1
(1) When 3x-2 ≥ 0, i.e. x ≥ 2 / 3
|3x－2|≤2x＋1
3x－2≤2x＋1
3x-2x≤1+2
x≤3
The solution is 2 / 3 ≤ x ≤ 3
（2）3x-2
Mathematical conversion formula 1 liter =? Jin
1 liter of water = 1 kg = 2 kg, 1 liter = 0.001 cubic meter. It depends on the specific liquid density
(3x-30)：(4x-30)=1:
(3x-30)：(4x-30)=1:3
4x-30=3*(3X-30)
4x-30=9X-90
5X=60
X=12
(3x-30)：(4x-30)=1:3
(3x-30)*3=(4x-30)*1
9x-90=4x-30
5x=60
x=12