It is fast to solve equation 3 (x + 2) - 2 (1-x) = 4x + 9.5

It is fast to solve equation 3 (x + 2) - 2 (1-x) = 4x + 9.5

3(x+2)-2(1-x )=4x+9.5
3x+6-2+2x=4x+9.5
3x+2x-4x=9.5-6+2
x=5.5

How to solve the equation 4 (X-2) - 3 (4x-1) = 9 (1-x)

4x-8-12x+3=9-9x
4x-12x+9x=9-3+8
x=14

4x+5%x=2 8 ---÷----- 13 39
It's 4x + 5% x = two-thirds ／ eight-thirds

4x+5%x=2/13÷8/39
4.05x=3/4
4.05x=0.75
x=75/405
x=5/27

Cross multiplication of X to the second power-7x-44

-44=-11×4
-11+4=-7
therefore
1 -11
×
1 4
So the original formula = (X-11) (x + 4)

X ^ 4 + 2x ^ 2-8 cross multiplication

x² +4
x² -2
x^4+2x^2-8
=(x²+4)(x²-2）

2X ^ 2-x-6 = 0, solve it by cross multiplication,

Using cross phase multiplication to solve: x ^ 2-2x-152, (x ^ 2 + x) ^ 2-8 (x ^ 2 + x) + 12

x^2-2x-15=(x-5)(x+3) （x^2+x）^2-8(x^2+x)+12=(x^2+x-6)(x^2+x-2)=(x-3)(x+2)(x+2)(x-1)=(x+2)^2(x-1)(x-3)

X ^ 2-2x-1 = 0 (cross multiplication)

Are you sure you didn't copy the wrong question? If it's followed by + 1, you can solve it

Is 2x ^ 2-7x + 3 = (2x-1) (2x-3) a cross multiplication?

Your answer is wrong
Cross phase multiplication is calculated as follows:
2x^2-7x+3
=2x*x-(2*3)x-x+1*3
=(2x-1)(x-3)
2 1
1 3

How to solve x square + 2x-7 = 0 by cross multiplication

You can't multiply by a cross
X is not a rational number
Use formula
x²+2x=7
x²+2x+1=8
(x+1)²=(±2√2)²
x+1=±2√2
x=-1-2√2,x=-1+2√2