exam Maths Puzzle Numerical Ability

If the discriminat is negative, would this be a true statement?

The discriminant is negative, so the quadratic has no real-valued zeroes and therefore no solution.

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exam Other Question

Solve for angle &#952; to the nearest degree, 0 degrees <(or equal to)&#952; < (or equal to) 90 degrees

a) sin &#952; = 1/2
b) tan &#952; = square root 3
b) cos &#952; = 0.253
Find the LCM of (6+7x), (36-49x^2), and (6-7x)