Find the x- and y- intercepts of the graph of the equation x^2 + y^2 = 49.
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x²+y²=49 is the equation of a circle radius 7 centred at the origin, so its intercepts are (-7,0), (7,0), (0,-7), (0,7). x-intercepts are found by plugging in y=0, giving x=±√49 and conversely for y-intercepts.

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