1) V 196 = V 2*2*7*7 = 2*7 = 14 V 4.41 = V 2*2*1.1025 = 2V1.025 V 25\ 361 = V (5*5 \ 19*19 = 5\19 V 1 9\16 = V 25\16 = V (5*5) \ (4*4) = 5\4 = 1 1\4 = 1.25 2) (V6)^2 = 6 (-V21)^4 = (-21^2) = 441 (-V(-18)^2)^2 = (-18)^2 = 324 3) (5V6)^2 = 5^2 * 6 = 25 * 6 = 150 -5 V (-6)^2 = -5 * 6 = - 30 (-6V5)^2 = (-6)^2 * 5 = 36 * 5 = 180 4) V 625 - V 225 = V 25*25) - V (15*15) = 25 - 15 = 10 V 16 \ 81 = V ( 4*4) \ (9*9) = 4\9 V 2.56 = V 1.6 * 1.6 = 1.6 5) 2X^2 = 450 X^2 = 225 X^2 = 15^2 X1 = + 15 X2 = - 15 6) 2X^2 = 30 X^2 = 15 X1 = + V (15) = + 3.87 X2 = - 3.87 7) 2 V X = 30 V 4X = 30 V 4X = V 900 4X = 900 X = 225