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1Â week, 2Â days ago
1Â week, 1Â day ago
dividend = d*q+remainder
f(x)=(x-5)q1+17
f(5)=0+17
f(x)=(x-6)q2+19
f(6)=0+19
let ax+b be the remainder when divided by (x-5)(x-6)
f(x)=(x-5)(X-6)q3+ax+b
f(5)=0+5a+b
f(6)=0+6a+b
f(5)=17=5a+b
f(6)=19=6a+b
subtract
a=2
b=7
remainder=2x+7
Quick, easy and effective revision