exam Maths Puzzle Numerical Ability

I need help factoring these polynomials completely.

20x squared - 7x - 6

ab - a - b + 1

and -8z squared + 48z - 72

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exam Other Question

Students are traveling in two cars to a football game 135 miles away. The first car travels at a average speed of 45 miles per hour. The second car starts one-half hour after the f Find the corresponding y values for x = -4, -3, -2, -1, 0, 1, 2 if y = x^2 + 2x- 3. help this is not sinking in at all.