Solve the following equations x^2-2x+4=0, x^2+4x+1=0
x2-2x+4= (x-2)(x-2)=0 x=-2 (double root)
x2+5x+1=0
x1,2= -5+_ (52-4(1)(1) )0.5/2
x1=4.8 x2=-0.2 (to 1 d.p.)
KF
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