exam Maths Puzzle Numerical Ability

Solve by completing the square

x^2+4x-3=0

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exam Other Question

Given f(x)=-5x^4+x^3+2x^2+3x+1, and k=1, express f(x) in the form f(x)=(x-k)q(x)+r

thank you Convert to exponential form. For example, the exponential form of "log5 25 = 2" is "52 = 25".
log 3 27 = 3