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.
\[7\cdot m=-9\cdot m^2+7\]
The centre column shows the steps in words, and the right column shows the equation after the step is applied.
\[7\cdot m=-9\cdot m^2+7\]
The centre column shows the steps in words, and the right column shows the equation after the step is applied.
- step 1
- step 2
- step 3
- step 4
- step 5
- determine number of solutions
- calculate discriminant
- determine solutions
- determine #a#, #b# and #c#
- reduce to #0#
- #9\cdot m^2+7\cdot m-7=0#
- #a=9#, #b=7# and #c=-7#
- #m={{-\sqrt{7}\cdot \sqrt{43}-7}\over{18}} \lor m={{\sqrt{7}\cdot \sqrt{43}-7}\over{18}}#
- #D=301#
- #D \gt 0#, hence, there are #2# solutions
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