How can I find the quadric equation when I know the answer?

Answer 1

There is more than one equation that gives a particular answer.

If you mean QUADRATIC equation and you know BOTH roots a and b, the equation can be written
c(x-a)(x-b) = 0
where c is any constant

If you know only one root (say a), b can be anything, and you get an infinite number of possible equations with 'a' as a solution.

Answer 2

the width of a rectangle is 30m^9n^4p^7 and the lenght is 10m^4p^6.what is the area of the rectangle?