exam Maths Puzzle Numerical Ability

What does it mean when it says "find the quadratic equation where f(1)=2 and the maximum value of f is f(3)=-5"?

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exam Other Question

If you have l(1) with equation x-3y=6 L2 with equation 3x+y=3 1 greater than 1/2 /6-x/ -3/4

the lines before the six and after x stand for absolute value
Solve each absolute value inequality and graph it.