+2 is the square root of 4
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it is the square root of 16 which equals 4.
the square root of 4 is 2 square root 2
3
X^2=1/4 take the square root of both sides The square root of 1/4 is 1/2 Check: (1/2)(1/2)=1/4
Y²-5Y+4=0 Y1=-(-5/2) - Square root of ((-5/2)²-4) Y1= 2.5 - Square root of 2.25 Y1 = 1 Y2=-(-5/2) + Square root of ((-5/2)²-4) Y2= 2.5 + Square root of 2.25 Y2 = 4 Y can be either 1 or 4