Work Step by Step
z^2+9=10z z^2-10z+9=0 Using ac method ac=9 b= -10 Two numbers are -9 and -1 then z^2-9z-z+9=0 z(z-9)-(z-9)=0 (z-1)(z-9)=0 z-1=0 z=1 z-9=0 z=9
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