Quadratic equations: Solving quadratic equations
The quadratic formula 1
Drag the steps to solve the equation below by means of the quadratic formula in the correct order.
\[-9\cdot m=-2\cdot m^2+7\]
The center column shows the steps in words, the right column shows the equation after the step is applied.
\[-9\cdot m=-2\cdot m^2+7\]
The center column shows the steps in words, the right column shows the equation after the step is applied.
- step 1
- step 2
- step 3
- step 4
- step 5
- determine #a#, #b# and #c#
- calculate discriminant
- determine number of solutions
- reduce to #0#
- determine solutions
- #D=137#
- #m={{9-\sqrt{137}}\over{4}} \lor m={{\sqrt{137}+9}\over{4}}#
- #a=2#, #b=-9# and #c=-7#
- #D \gt 0#, hence, there are #2# solutions
- #2\cdot m^2-9\cdot m-7=0#
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