Write the following quadratic equation into standard form ax²+bx+a=0,then identify the value of a,b and c. show your complete solution the box your final answer.

1.2x-x+ 16=0
2.-5x(6x-7)+8=0 3.3x(x-3)-x=8 4.(x-6) (2x+7)=0 5.-3x-2(-2x²-9)​