pls help

Write the partial fraction decomposition of the rational expression. Check your result algebraically. x+ 9 x(x2 - 4) Use matrices to solve the system of equations (if possible). Use Gaussian elimination with back-substitution. (If there is no solution, enter NO SOLUTION. If there are infinitely many solutions, express x, y, and z in terms of the real number a.) 3x - 2y + co N -x+ y+ 2z = -11 x - y - 42 = 15 (x, y, Z) = Write the partial fraction decomposition of the rational expression. Check your result algebraically. x2 + 3x + 6 X3 + X