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Extraneous solution, one cannot take the square root of a negative number in the real number system.
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6x3=18 3x3=9 18-9=9
square root of 18
Several different ways in which the solution can be expressed. 2 √18 Take everything inside the square root. 2√18 = √(4 x 18) = √72 Simplify the square root. 2√18 = 2√(9 x 2) = 2 x 3√2 = 6√2 Solve the square root. 2√18 = 2 x 4.24264 = 8.48528 (5dp)
18 sq rt 6