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Hi, start with putting y=0 this is where the graph intersects the x axis then put x=0 which gives a value for y this is where the graph intersects the x axis as on the x axis y=0 and on the y axis x=0

15 February 2013

therefore putting y=0 x=+2,-2 so there are two values

15 February 2013

after doing this you could get values inside the range when you know which are the intercepts

15 February 2013

when you will draw the graph you will get a circle

15 February 2013

the radius of this circle is 2

15 February 2013

this is an equation of a circle

15 February 2013

Thank you sooooo much!

19 February 2013

As people have said, it is a circle. Because it is just x^2 and y^2 and not say (x - 2)^2 it has centre (0,0) the origin. The number 4 on the right hand side is the square of the radius, so it is a circle centre (0,0) and radius 2 which means it goes through the points (0, 2) and (2, 0) and (0, - 2) and (- 2, 0)

20 February 2013

Yep, thankyou :)

20 February 2013

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