Question 479551
x^2 - 15x - 2

This can be done in many ways

x^2-15x+(7.5)^2-2=0

x^2-15x+(7.5)^2=2+(7.5)^2

(x-7.5)^2= 2+56.25
(x-7.5)^2=58.25

Take the square root of both sides

(x-7.5)= +/- sqrt(58.25)
(x-7.5)= 7.63

x= 7.5+7.63= 15.13

OR
x= 7.5-7.63= -0.13

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