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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

x_1,2= -5+_ (5²-4(1)(1) )^0.5/2

x₁=4.8 x₂=-0.2 (to 1 d.p.)

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Answered by Kyriakos F. • Maths tutor

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