solve the quadratic equation x-13x+30=0 factorisation method
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x^2-13x+30=0
x^2-3x-10x+30=0
x(x-3)+10(x-3)=0
(x-3) (x+10)=0
x-3=0. or. x+10=0
x=3. or. x=-10
x^2-3x-10x+30=0
x(x-3)+10(x-3)=0
(x-3) (x+10)=0
x-3=0. or. x+10=0
x=3. or. x=-10
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