Question

a)x-1 supra 2=18 supra x-1,b)2 supra x- radical 3=x- radical 3 supra 24



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Answer 1

a)x^2 - 2x + 1 = 16
x^2 - 2x - 15 = 0
delta = 4+60=64 => radical din delta = 8
x1=(2-8)/2=(-3)
x2=(2+8)/2=5

b)x^2 - 2rad3x + 3 = 48
x^2 - 2rad3x - 45 = 0
delta = 12+180 = 192 => radical din delta = 8rad3
x1=(2rad3-8rad3)/2=(-3rad3)
x2=(2rad3+8rad3)/2=5rad3