SOLUTION: Use cramers Rule to solve the Linear system {5x-4y=8 {2x+7y=-3 solve the equation 5x2-8=22 solve the equation 3x2+5x2-1=0

Algebra ->  Matrices-and-determiminant -> SOLUTION: Use cramers Rule to solve the Linear system {5x-4y=8 {2x+7y=-3 solve the equation 5x2-8=22 solve the equation 3x2+5x2-1=0      Log On


   

Question 39491: Use cramers Rule to solve the Linear system
{5x-4y=8
{2x+7y=-3
solve the equation
5x2-8=22
solve the equation
3x2+5x2-1=0
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
5 -4|
2 7 |35+8=43 THE DENOMINATOR
8 -4 |
-3 7 |56-12=44 X=44/43
5 8 |
2-3 |-15-16=-31 Y=-31/43
5X~2-8-22=0 OR 5X~2-30=0 OR X~2=30/5 OR X~2=6
3X~2+5X~2-1=0 OR 8X~2-1=0 OR X~2=1/8