Grade 12Algebra
I have tried a lot of times, but still cannot figure out how to solve these problems. Please help. And please submit the calcultions too if necessary, because I think I've tried right methods and can't spot where I have mistaken.
1. Solve the equations uusing Cramer's rule.
1/x + 1/y + 1/z = 1, 2/x + 5/y + 3/z = 0, 1/x + 2/y + 4/z = 3
2. The vertex of a parabola is (-2,3) and its directrix is x+7=0; find the quation of the parabola.
I have tried a lot of times, but still cannot figure out how to solve these problems. Please help. And please submit the calcultions too if necessary, because I think I've tried right methods and can't spot where I have mistaken.
1. Solve the equations uusing Cramer's rule.
1/x + 1/y + 1/z = 1, 2/x + 5/y + 3/z = 0, 1/x + 2/y + 4/z = 3
2. The vertex of a parabola is (-2,3) and its directrix is x+7=0; find the quation of the parabola.
