Solve the following equations:


Operating C1→C1+C2+C3



Taking (x+a+b+c) common from C1



Operating R1→R1-R3, R2→R2-R3



Expanding with C1


0=(x+a+b+c)(0+x2)


0=x2(x+a+b+c)


Either x2=0 or (x+a+b+c)=0


∴ x=0 or x=-(a+b+c)


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