exam Maths Puzzle Numerical Ability

I have no idea how to answer this question.

How do you determine if a polynomial is the difference of 2 squares?

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exam Other Question

i need help solve 2x^2-3x-2=0 using the quadratic formula HELP!

I am stuck on how to figure out solution sets. For example, I have an equation that goes like this.

y= -x + 1

How do I calculate solution sets?