book Maths Puzzle Numerical Ability

solve.

b^2 -12b+32=0

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book Other Question

Find the equation of the line passing through the points (-3,8) and (-4,-5)

A) y=13x-47
B) y=13x+47
C) y=13x-31
D) y= -13x-31 I need help factoring the following problem

3x^2 + 2x - 16

thanks