It is known that when x = 1, fraction x + 2B / x-a is meaningless; when x = 4, the value of fraction is 0, and find the value of a + B

It is known that when x = 1, fraction x + 2B / x-a is meaningless; when x = 4, the value of fraction is 0, and find the value of a + B

a=1,b=-2,a+b=-1

How to solve the fractional equation 3 / xsquare + 2x-1 / xsquare-2x = 0?

3/(x^2+2x)-1/(x^2-2x)=0
∵x≠0
Both sides are multiplied by X at the same time
3/(x+2)=1/(x-2)
Multiply both sides by (x + 2) (X-2)
3(x-2)=x+2
==>2x=8
X=4
It is proved that x = 4 is the solution of the equation

(2x -) quadratic - 3x = (x + 1) (4x-3) + 5, X The second power of (2x-1) - 3x = (x + 1) (4x-3) + 5, X

(2X-1)^2-3X=(X+1)(4X-3)+5
4X^2-4X+1-3X=4X^2+X-3+5
8X=-1
X=-1/8

If the square of the algebraic expression 2x minus 3x + 7 is 5, what is the value of the square of the algebraic expression x plus 2 / 2 and 3x minus 2

Wrong
After that is - 3x / 2, not 3x / 2
2x²-3x+7=5
2x²-3x=-2
Divide both sides by 2
x²-3x/2=-1
x²-3x/2-2=-1-2=-3

The fraction A / B is meaningless if it satisfies the condition

B = 0 is meaningless

If we increase x and Y in 2Y / 2x-3y by 5 times, how many times will the fraction be enlarged or reduced?

unchanged

Given X / y = 2, find the value of X? - XY + 3Y? / x? + XY + 6y

x/y=2
x=2y
x²-xy+3y²/x²+xy+6y²
=4y^2-2y^2+3y^2/4y^2+2y^2+6y^2
=5y^2/12y^2
=5/12

Given (4x-3y) 2 = (3x-2y) 2 and XY ≠ 0, find X The value of Y

∵（4x-3y）2=（3x-2y）2，
∴（4x-3y）2-（3x-2y）2=0，
∴（4x-3y+3x-2y）（4x-3y-3x+2y）=0，
That is (7x-5y) (X-Y) = 0,
ν 7x-5y = 0 or X-Y = 0,
The solution is X
Y = 1 or 5
7．

When x=___ The fraction x-3 / x? - 5x + 6 is meaningless 1. if the equation 1/x-1+m/x-2=2m+2/ (x-1) (X-2) has a zenith, then the zenith is_____ The corresponding M is_____ . 2. When x=___ The fraction x-3 / x? - 5x + 6 is meaningless It's best to have a process,

1. If the equation 1 / X-1 + m / X-2 = 2m + 2 / (x-1) (X-2) has a Zeng root, then the Zeng root is__ X = 1 or x = 2___ The corresponding M is - 3 / 2 or - 2____ .
2. When x = 2 or 3___ The fraction x-3 / x? - 5x + 6 is meaningless

Do not change the values of the following fractions so that the coefficients of the highest order term in the numerator and denominator are positive, and the polynomials in the numerator and denominator are arranged in descending power of X: (1) 2X + 1-x squared - 3-2x (2) the third power of negative X - 3x + 1 / 2-x square

(1) 2X + 1-x squared - 3-2x
=(2x+3)/(x²-2x-1)
(2) The third power of negative X - 3x + 1 / 2-x squared
=(x²-2)/(x³+3x-1)