Solve the following equations , please show your work.

\f29. 15x2 - 8 = 14x 30. 8x- -21x = 2x2 31. Given that / (x) =3x -18x +12 find all values of x such that f (x) =12 f(x) - 3-x 32. Find the domain of the function f given by x- - 6x+9. 33. The base of a triangle is 5 cm greater than the height. The area of the triangle is 42 cm2. Find the height and the base. Include a diagram