Mathematics for IGCSE & O level - Graphs Of Functions (Section 3 - No. 44)
If a quadratic graph's equation is y = x^2 - 4, where does the curve cut the x-axis?
x=2
x=-2
x=4
x=-4
Explanation
The x-intercepts are where y=0, meaning x^2 = 4, so x= +/-2.
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