exam Maths Puzzle Numerical Ability

Find the midpoint of the line segment PQ
P(5,4)Q( 2,8)

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exam Other Question

The degree three polynomial f(x) with real coefficients and leading coefficient 1 has -3 and 4i among its roots. Express f(x)as a porduct of linear and quadratic polynomials with real coefficients. log base 7 of x=-2