Answer:
Step-by-step explanation:
Given;
x² - 2x - 1 = 0
Solve by completing the square method;
⇒ take the constant to the right hand side of the equation.
x² - 2x = 1
⇒ take half of coefficient of x = ¹/₂ x -2 = -1
⇒ square half of coefficient of x and add it to the both sides of the equation
⇒ take the square root of both sides;
Therefore, option B is the right solution.
Answer:
The friends live 285 miles apart.
Step-by-step explanation:
Let total distance in miles Sean needs to cover to visit his friend be =
On first hour distance traveled in miles is =
Distance left to cover after first hour =
On second hour distance traveled = 34 miles
Distance to still left to be covered = 194 miles
Total distance to be covered after first hour will be = = 228 miles
Thus, the equation can be given as:
⇒
Multiplying each term with 5 to remove fractions.
⇒
⇒
⇒
Dividing both sides by 4.
⇒
∴
Thus, the friends live 285 miles apart.