x^2 %2B 8*x %2B 3=0 – InterviewSolution

1.

x^2 %2B 8*x %2B 3=0

Answer»

x^2+8x+3=0=(x)^2+2x×4+(4)^2-13=0(x+4)^2=13(x+4)=+-√13x= +√13-4x= -√13-4

x^2+8x+3=0; a=1 b=8, c=3; x=-b+-Vb^2-4ac/2a 8+-V64-4(1)(3)/2(1)= V64-12/2=V52/2=V26

correct answer isx = 9,-17

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