3 times 3 times 5 times x times x equals 45x2
It could be x(1 -1) when factorised
(x-9)(x+1)
(x-6)(x+3)
(x + 7)(x - 9)
x - 5 is in its simplest form.
(x + 4)(x + 1)
x^2-x+1 cannot be factorised
It can: For example, the linear polynomial 2x + 4 can be factorised into 2 times (x+2) So the question is inappropriate.
x2 - 41 cannot be factorised.
x2 - 36 = x2 - 62 = (x + 6)(x - 6)
x2-9x+18 = (x-3)(x-6) when factorised