The number 72 lies between the perfect squares 64 and 81
. So, the square root of 72 lies between the numbers 7 and 8
, which means the square root of 72 is a rational number.
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(4,9) is in quarter I and (4,-9) is in quarter IV of the graph. (4,-9) is the point (4,9) reflected over the x-axis. they are similar bc both have 4 as their x coordinate.
