book Maths Puzzle Numerical Ability

how do you pair up a solution of a equations

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book Other Question

What is the formula to find the distance between 2 points on a graph. For example the points are (-2,5) & (-3,-1) 1)simplify 3(2x+1)-3(x-1)(x+1)

2) If 2x+1=3 and 2x^2-5x-3=24, what does x-3 equal? (plz explain)

3)find k so that x^2-kx+25 is a perfect square (Explain plz)

4)what sho