exam Maths Puzzle Numerical Ability

complete the square
x^2+4x=6

x= ? and ?

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exam Other Question

Find the quotient and remainder of f(x)= x^3-4x^2+5x+5 divided by p(x) = x-1. My answer is x^2+2x+2; 7 but unsure if it is right. thanks for looking over my answer. Find an equation of the line satisfying the given conditions.
Through (0, 2); m=3/2