Exam Maths Puzzle Algebra

Q1. The sum of two numbers is 18 and the sum of their squares is 164. Find the numbers.

Q2. Find two numbers that total 12 and whose squares total 90.

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Exam Other Question

Solve
f(x)= 1/2x^2 + 6x^2 - 9?
A chain store manager has been told by the main office that daily profit P is related to the number of clerks working that day. x according to equation P=-25x^2+300x. What number of clerks will maximize the profit and what is the maximum possible profit?