exam
Maths Puzzle
Numerical Ability
using cramers rule, solve
2x - y = 4
3x + y - z = 10
y + z = 3
Read Solution (Total 0)
exam Other Question
How do I answer this problem.
y^4+3y^3-5y^2-15y
I tried to solve it this way but I think that it is wrong.
y^4 + 3y^3 -5y^2-15y
y^3(y+3) -5y(y+3)
=(y+3)(y^3-5y)
y=2x
x-y=4
solve by substituition