If you mean y = 2x+1 then it is a straight line equation whereas the slope is 2 and the y intercept is 1
8x-4
That's not real clear. It could be 2 times positive 1 (which is 2) plus 5, which equals 7. It could be 2x + 1 + 5 which equals 2x + 6 It could be 2x + 1 = 5, in which case x = 2
4
(2x + 1)(2x + 1) or (2x + 1)2
x=1
x = 0
4x2 + 12x + 5 = 4x2 + 2x + 10x + 5 = 2x(2x+1) + 5(2x+1) = (2x+1)(2x+5)
14
(2x + 3)(x + 1 ) = 2x^2 +5x +3
4x-1=2x+1
It will be the positive reciprocal of -2 which is 1/2
2x2 + 2x = 2x(x+1)