Question

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Answer 1

Using b^2 - 4ac will let u know.

Answer 2

\[\Large \Delta =b^2-4ac\]

\[\Large \Delta =36-12\cdot (-7)\]

\[\Large \Delta=120\]

so...

\[\Large \Delta>0 \] -- Two real solutions..

\[\Large \Delta =0\] One real solution..

\[\Large \Delta <0\] No real solutions.. So you have

\[\Large \Delta >0\]
Hence the answer is two real solutions ! ;)