These are the steps. Just follow the numbers on the left hand side. Hopes this helps. The answer is -3.
Answer:
2C
Step-by-step explanation:
-4C+14C=10C
10C-8C=2C
No profit means P(x)=0: x³-4x²+3x-12=0
factor by regrouping: x²(x-4)+3(x-4)=0
take out (x-4): (x-4)(x²+3)=0
x=4 or x²=-3
x² is not a negative number, so x=4 is the only answer.
72.26 would be your answer ... :)