1) The real and imaginary parts of the complex number z = x + iy satisfy the equation (2-i)x - (1+3i)y - 7 = 0.
Find the value of x and the value of y.
And for another question I have to solve a^4 - 11a^2 - 900=0
Is there a quick way to do this because I used trial and error which took forever.
Any help is much appreciated!