Ineed an answer to this problem and short explanation

The measurement of one angle of a right triangle is 34°. what is the measurement of the third angle?

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1