Neither x-1 nor x4 is an equation or an inequality. There is, therefore, nothing to graph anything.
x4 - 81 = 0x4 = 81x = 3
28 is.
7
yes
Not necessarily.
N = x4 x8 = x4+4 = (x4)2 = N2
30 times 4 equals 120
9 x 4 = 36
(x^2 + 1)(x^2 - 4x + 13)
x^4 is not an inequality. (An inequality has a "bigger than or equal to/less than or equal to/less than/bigger than" sign involved. I.e not an "equals" sign, since this would be an "equality"). But x^4 is not an equality, nor an inequality.
if c = x2 then cx2 = x4