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Textbook Answers – Expanding Three Brackets

July 29, 2016

Workout

Question 1

(a)  x³ + 6x² + 11x + 6

(b) x³ + 9x² + 24x + 20

(c) x³ + 2x² – 5x – 6

(d) x³ + 4x² – 19x + 14

(e) x³ – 9x² + 26x – 24

(f) x³ – 7x² + 4x – 12

(g) 2x³ + 9x² + 10x + 3

(h) 3x³ + 10x² – 23x + 10

(i) 5x³ + 8x² – 7x – 6

(j) 2x³ – x² – 15x

(k) 9x³ – 69x² – 200x – 100

Question 2

(a) x³ + 6x² + 12x + 8

(b) x³ + 15x² + 75x + 125

(c) x³ – 9x² + 27x – 27

(d) x³ – 15x² + 75x – 125

(e) x³ + 7x² + 15x + 9

(f) x³ – 13x² + 56x – 80

(g) 8x³ + 36x² + 54x + 27

(h) 64 – 48x + 12x² – x³

(i) 125 – 150x + 60x² – 8x³

(j) x³ – 4x² – 3x + 18

(k) x³ + 12x² + 36x

Question 3

(a)  4x³ + 29x² + 54x + 37

(b) 7x³ – 24x² + 6x + 37

Apply

Question 1:  a=5

Question 2:  a=2  and  b=1

Question 3:  a=6  and b=10

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