How do you solve #x(x+6)=-15# using the quadratic formula?
No real solutions, x>0
We have -15, bring that over to make + 15
so the equation is
collect terms for the quadratic formula
a is the number in front of
b is the number in front of
c is the number without an
a = 1
b = 6
c = 15
remember minuses matter, however there are none in this question.
so plug it in
put into your calculator as is, i'd suggest one from here: https://goo.gl/JtHwiA they are brilliant. (Casio 991ex)
This leaves a negative number in your square root, which means imaginary numbers.. No real solution is obtainable