Factorise : (s – 6)(s – 3) – (3 – s)
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Step-by-step explanation:
=s^2-3s-6s+18-3+s=0
=s^2-8s+15=0
=s^2-5s-3s+15=0
=s(s-5) -3(s-5) =0
=(s-5) (s-3) =0
=s=5 or s=3
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