book Maths Puzzle Numerical Ability

Use Cramer's rule to solve for z:

2x-3y-z=-17
2x+3y-z=-5
3x-2y-z=-20

Read Solution (Total 0)

book Other Question

Please solve:

x^4 - 4x^3 + 3x / x^2 -1

I get x^2 - 4x + 1 - x + 2/x^2 - 1 How do you find out if the function is exponential,linear,reciprocal or quadratic?