Write each quadratic equation in standard form.( Formula: ax^{2} + bx + c = 0 )
1. 5 - 2x^(2) = 6x
2.(x + 3) (x + 4) = 0
3.(2x + 7) (x -1)=0
4.(x - 4)^2+8=0
5.(x^(2)=3(x + 2)