Texas Instruments TITANIUM TI-89 - Manual (Page 746)

Activities 746
Exploring a Matrix Exploring a Matrix Exploring a Matrix Exploring a Matrix
This activity shows you how to perform several matrix operations.
9. Take the square root of both sides of the
equation with the constraint that a>0 and
b>0 and x>0 .
10. Solve for x by subtracting b from both
sides and then dividing by 2a .
Note: This is only one of the two general
quadratic solutions due to the constraint
in step 9.