x2+2(m-1)x+(m+5)=0 equal roots
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since the given equation has equal root.
so,D=0
or,b^2 _4ac=0
or,4(m_1)^2 _4×1×(m+5)=0
or,4(m^2+1 _2m)_4m_20=0
or,4m^2+4 _8m _4m _20=0
or,4m^2_12m_16=0
or,m^2_3m_4=0
or,m^2_4m +1m_4=0
or,m(m_4)+1(m_4)=0
or,(m+1)(m_4)=
so,.m=_1,4ans.
so,D=0
or,b^2 _4ac=0
or,4(m_1)^2 _4×1×(m+5)=0
or,4(m^2+1 _2m)_4m_20=0
or,4m^2+4 _8m _4m _20=0
or,4m^2_12m_16=0
or,m^2_3m_4=0
or,m^2_4m +1m_4=0
or,m(m_4)+1(m_4)=0
or,(m+1)(m_4)=
so,.m=_1,4ans.
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