An equation for your number (x) can be written ...

x = x

x

(x-6)(x+5) = 0 (factored)

x = 6 or x = -5

A positive number 30 less than its square is 6, which is 30 less than 36.

x = x

^{2}- 30x

^{2}- x - 30 = 0 (arranged in standard form)(x-6)(x+5) = 0 (factored)

x = 6 or x = -5

A positive number 30 less than its square is 6, which is 30 less than 36.