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Imagine a bag of balls. Each ball represents a student, and those with A on them are students with internet access, while balls without an A are those without internet access. We know from the question, w...

This question is about multiplying two brackets together. There are two parts to each bracket: x, +3 and x, +5. The parts in the first b...

Completing the square is a useful method of rearranging a quadratic equation so the unknown ("x") only appears in it once. The theory of completing the square tells us that we can take a quadrat...