find the exact values of sine, cosine, and tangent of the angle(use sum and difference formulas) 225=210+45

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

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.

What are the sotions to the quadratic equation 9x^2=4