The calculator solution will show work to solve a quadratic equation by completing the square to solve the entered equation for real and complex roots. Step 4 Take the square root on both sides of. So we solved the equation by completing the square method.
This algebra 2 video tutorial shows you how to complete the square to solve quadratic equations.
Although the quadratic formula works on any quadratic equation in standard form it is easy to make errors in substituting the values into the formula. So you end up with x2 -2x 1 - 168 -1 you have to subtract 1 to balance the 1 you added. Pay close attention when substituting and use parentheses when inserting a negative number. 1 Rewrite the equation by completing the square.