Question

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Answer 1

Answer:

(i) 4 and 5

Step-by-step explanation:

factorising 20 we get -4 x -5 = 20

by splitting the middle term,

x^2 -4x-5x+20=0

x(x-4)-5(x-4)=0

(x-5)(x-4)=0

so, x-5=0

x= 5

or

x-4=0

x=4