exam Maths Puzzle Numerical Ability

The problem says: Find all zeros of: {{{ Q(x)=x^6-4x^5+5x^4-x^2+4x-5 }}}. I used Decartes Rule of Signs, Rational Zeros Theorem, and synthetic division to find that x=-1 and x=1

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exam Other Question

What is the most debt a company will be if debt represents negative profit, p(t), and p(t) = t^2 -5t - 50 with p(t) units of $1000 and t = fiscal quarters?
a. -$50,000
b. 2.5 fis How do you find points when there is no x like 2y=5
or how do I find a point when there is no y like x+6=0