-2x - 5
2x-6 < 5+7x 2x-7x < 5+6 -5x < 11 x > -2.5
(2x - 4)/(4x + 5) - 12
== == -2x-5
2x-5=25 2x = 30 x=15
x is less than or equal to 6
Is simply 2x + 5, nothing more, nothing less.
-2x = y^5 or y^5 = -2x y = (-2x)^(1/5)
-2x + 4 < 10 -4 -4 --------------------- -2x < 10 --- ---- (divide) -2x -2x ---------------- -x > -5 (switch the sign when you divide by a negative) Hope that helps :)
4x2 + 12x + 5 = 4x2 + 2x + 10x + 5 = 2x(2x+1) + 5(2x+1) = (2x+1)(2x+5)
x > -3
x2 - 15 = 2x x2 - 2x - 15 = 0 x2 - 2x - 15 = (x - 5)(x + 3) x = 5, -3
2(2x + 5)(2x - 5)