Question

X power2-x-4 factorise

Answer 1

x^2-x-4=0

x^2-2x(1/2)+(1/2)^2-(1/2)^2-4=0

(x-1/2)^2-1/4-4=0

(x-1/2)^2-17/4=0

(x-1/2)^2=17/4

x-1/2=+√17/2

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x=(1+√17)/2. x=(1-√17)/2