4x2 = 36
x2 = 36/4 = 9
x = sqrt(9)
x = ±3
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The answer is: 2 or -2
the product of 15 and a number by its self four times.
A square with an area of 400m has a side length of 20m. The perimeter of a square of four times the length of one of its sides. Four times 20m is 80m. Therefore, the perimeter is 80m.
1024
The square root of 64 is 8 because 8 times 8 = 64