The problem is a long division problem.
The first step is done, which is "Divide 1st term of the dividend by the first term of the divisor to get the first term of the quotient"
The second step is done too, and it is to take the term found in step 1 and multiply it times the divisor, then put the result under the dividend.
The next step is to subtract this line from the line above, it is to subtract 8x^2-28x from 8x^2+6x, which obtains 0+34x.
The next step is to bring down -5 and form the new dividend 34x-5