diketahui ײ+4×-2=0 maka nilai 2(×1 +×2)=0 adalah
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Penyelesaian:
x²+4x-2=0
2(x1+x2)=?
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a=1
b=4
c=-2
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x1+x2=-b/a
x1+x2=-4/1
x1+x2=-4
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2(-4)=-8
[tex] \boxed{ \colorbox{black}{ \sf{ \color{lightgreen}{ answered\:by\:Duone}}}} [/tex]
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