Answer: 7
Step-by-step explanation:
Without speeding up it would take 5 1/3 seconds.. not sure if it speeds up in the question?
Count change of signs to tell positive roots
then replace x with -x and evaluate, then count change in sign for negative roots
initially
+, -, -, +, +, -
3 changes
3 or 1 positive roots
replacing x with -x
-,-,+,+,-,-
2 changes
2 or 0 negative roots
B is answer
Answer:
I think it's the top right
Step-by-step explanation:
Just take it trust me
