exam Maths Puzzle Numerical Ability

(2z-3)1/2=9

the (2z-3) is raised to the 1/2 power.

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exam Other Question

Find the value of the discriminant for 9x^2+1=6x. Then describe the number and type of roots for the equation.

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write the equation, in slope intercept form, of the line containing the points (-1,5) and (1,3)