How do I know when to use the B formula?

VampireBlue1234
Hey the hint is normally in the question like *to two decimal places*

brendan.harney.73
ok thank you so much

shadan
if when u try to do a regular quadratic and its un solvable:)

brendan.harney.73
thanks

themathstutor.ie
You can actually use it as your default method, if you prefer not to get into factorising the quadratic.
It works even when the roots are whole numbers, so it's actually a more general method of solving a quadratic than the factorising method, which only works for rational roots.
Give it a go and see for yourself :)

Me
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