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.
\[7\cdot q=-5\cdot q^2+9\]
The centre column shows the steps in words, and the right column shows the equation after the step is applied.
\[7\cdot q=-5\cdot q^2+9\]
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
- reduce to #0#
- determine #a#, #b# and #c#
- #D=229#
- #5\cdot q^2+7\cdot q-9=0#
- #D \gt 0#, hence, there are #2# solutions
- #a=5#, #b=7# and #c=-9#
- #q={{-\sqrt{229}-7}\over{10}} \lor q={{\sqrt{229}-7}\over{10}}#
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