exam Maths Puzzle Numerical Ability

I made a mistake the problems are from chapter 2.7 not 2.5.

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exam Other Question

Write an equation of the line that passes through the point and has the given slope. Write the equation in slope-intercept form.

(7, -7), m = -3
Factor each polynomial by grouping the first two terms and the last two terms.
x^3- 4x^2 + 2x -8

I am confussed an need some help. Thanks.