exam Maths Puzzle Numerical Ability

Is sqrt (x^2) = x an identity (true for all values of x)?

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exam Other Question

# |z-i|2 and z0 = 5 + 3i ; The maximum value of |iz+z0| is _______
a) 2 + (31)
b) (31) - 2
c) 7
d) -7 Determine the equation of each line. Write the answers in standard form using only integers as the coefficients.

The line through (0,9) that is parallel to the line 3x+5y=15