exam Maths Puzzle Numerical Ability

please help with this one.

Use the quadratic formula to solve the equation:

16x^2 - 40x +5 = 0

thank you in advance

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exam Other Question

How many positive divisors does 3^6 * 12^4 * 15^2 * 27^3 * 64^5 * 25^10 have? Without solving each equation, determine the nature of the roots.
a. 3y^2-10y+1=0
b. 2w^2+6w+10=0