Maths
X squared(k+3)x+4k=0
Please help me find the value of k for which there are equal roots but of opposite sign
Working out please thanks
asked by
Jiskhaa

Let r be the root:
x²(k+3)x+4k= 0 = (xr)(x+r)=x²r²
equating coefficients,
(k+3)=0, k=3
4k=r², r=sqrt(3*4)=2√3
or the equation is
x²12=0
Find k from the equation.posted by MathMate
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