3x power 2-9x -12 please do it for 50 point
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Answer:
3x^2-9x-12=0
a=3, b=9,c=-12
√b^2-4ac
=-9^2-4×3×-12
=81-12×-12
=81+144
=225
√225=15
-b+or -(√b^2-4ac)/2a
=(9+15)/2×3. or (9-15)/2×3
=24/6. =-6/6
=8. =-1
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