exam Maths Puzzle Numerical Ability

I need to solve 5x^+2x=2 by using the quadratic formula. Help!

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exam Other Question

Determine the largest prime divisor of 87! + 88! . I have a couple questions I need help with. Thank you so much!

Use Descartes rule of signs and the Rational Zeros Theorem to find all the real zeros of each polynomial function.