Question

help me please fans and medal awarded!!!
What is the general form of the equation of a circle with center at (a, b) and radius of length m?

x2 + y2 − 2ax − 2by + (a2 + b2 − m2) = 0

x2 + y2 + 2ax + 2by + (a2 + b2 − m2) = 0

x2 + y2 − 2ax − 2by + (a + b − m2) = 0

x2 + y2 + 2ax + 2by + a2 + b2 = -m2

Answer 1

@mathslover can you help me please

Answer 2

This is the very basic topic of "Circle" . I think, you should have a look at the lesson : http://www.mathsisfun.com/algebra/circle-equations.html

Answer 3

i still dont understand it

Answer 4

the standard equation for a circle is: (x-a)^2 + (y-b)^2 = 0
then factor that and arrange, that will give you your answer

Answer 5

sorry typo: (x-a)^2 + (y-b)^2 = m^2 not 0

Answer 6

i dont understand how to factor it thoug ive tried numerous times

Answer 7

(x-a)^2 + (y-b)^2 = m^2 means
(x-a)(x-a) + (y-b)(y-b) = m^2 then you foil

Answer 8

whatss foil

Answer 9

ive only heard of pemdas

Answer 10

FOIL = First, Outer, Inner, Last
for (x-a)(x-a) =
first x*x
outer x*(-a)
inner (-a)*x
last (-a)*(-a)
so it equals x*x + x*(-a) + (-a)*x + (-a)(-a)
so x^2 - 2ax + a^2

Answer 11

ok thank you