exam Maths Puzzle Numerical Ability

y2-3x+2=3x2
Okay I need work in solving for y in terms of x line by line?????????
Then say if it is a function or not and explain why or why not
HELP/thanks

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exam Other Question

if u enlarge a photo print to bring the shorter side from 1/2 inches to 3 inches, the longer side would go from 3/4 inches to how many centimeters? Is this equation a linear equation?

y = x2 + 4