We are using the addition operation and it done to a constant and an unknown.
So, the answer is x + 84.
(x+b/2a)^2-(b^2-4ac)/2a=0
Step 2:
Re-write the expression:
(x+b/2a)^2=(b^2-4ac)/4a^2
Step 3:
get the square root of both sides:
x+b/2a=sqrt[(b^2-4ac)/4a^2]
Step 4:
Simplifying we get:
x+b/2a=sqrt[b^2-4ac]/2a
Step 5
Make x the subject:
x=-b/2a+/-sqrt[b^2-4ac]/2a
Answer:
7n-12
Step-by-step explanation:
What is the actual equation or question? so o can answer
2.5 hours = 137.5 miles
1 hour = 137.5 ÷ 2.5 = 55 miles.
Answer: The average speed is 55 miles/hour