If the algebraic formula 3 times the square of x minus 4 times x plus 6 equals 9, then four thirds of the square of X + 6 equals 9

If the algebraic formula 3 times the square of x minus 4 times x plus 6 equals 9, then four thirds of the square of X + 6 equals 9

The calculation method is for reference

It is known that the center angle of a circle is n degrees and the length of the arc is l cm. The algebraic expression of N and l is used to express the radius of the circle______ ．

According to the arc length formula: l = n π R180, then r = 180ln π

There are two numbers whose sum is exactly the product of them
Denoted by the letter n

a+b=ab
(a+b)/ab=1
1/a+1/b=1
1/a=(b-1)/b
a=b/(b-1)
For example: B = 5, then a = 5 / 4
b=9,a=9/8