Z^2+12z+20
please freinds give me answer
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Given:- Z^2 + 12Z + 20 = 0
=> Z^2 + 2Z + 10Z + 20 = 0
=> Z(Z+2) + 10(Z+2) = 0
=> (Z+2) (Z+10) = 0
=> Z+2 = 0 or Z+10 = 0
=> Ans. Z= -2 or Z= -10
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