solve the following quadratic equation by factorisation method x²-17x+60=0
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(x^2)-17x+60=0
(x^2)-12x-5x+60=0
(x^2-12x)-(5x-60)=0
{x(x-12)}-{5(x-12)}=0
x(x-12)-5(x-12)=0
(x-12)(x-5)=0
x-12=0
x=0+12
x=12
x-5=0
x=0+5
x=5
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