x² + y² = 37
The equation of a circle centred at the origin is.
x² + y² = r² ( where r is the radius)
The radius can be calculated using the distance formula
r = √(x₂ - x₁ )² + (y₂ - y₁)²
where (x₁ , y₁) =(0,0) and (x₂ ,y₂) = (1 ,6)
r = √(1 - 0)² +(6 -0)² = √1 + 36 =√37⇒ r² = (√37)² = 37
x² + y² = 37 is the equation of the circle
It depends. Everyone have there own preferences . I myself use the completing square method because I can do it fast. But many of my colleagues use quadratic formula. so there is no such thing as which one is easier.
Solve x2−6x−3=0
x2−6x=3
x2−6x+(−3)2=3+9
(x−3)^2=12
take square root on both sides
x−3=±12
x= 3 ±2√3
The answer to the question
We rule out y=0 because of the denominator y in the original equation.
Answer: B: y=-1
AnswerAnswer: C
Step-by-step explanation:c