Workout
Question 1
(a) x = 1, x = 3 (b) y = 4, y = 9 (c) m = −1, m = −6
(d) x = 3, x = −2 (e) t = −7, t = 3 (f) k = 10, k = −9
(g) w = −5, w = −11 (h) y = 8, y = 2 (i) x = −3, x = 9
Question 2
(a) x = −4, x = −2 (b) x = −4, x = −3 (c) y = −5, y= −2
(d) y = −4, y = 1 (e) x = −2, x = 4 (f) m = 3, m = 4
(g) y = 5 (h) y = −5, y = 9 (i) x = −7, x = 8
(j) y = −6, y = −4 (k) x = −6, x = −3 (l) x = −22, x = −1
(m) y = 2, y = 11 (n) x = −4, x = 3 (o) m = −3, m = 9
(p) x = 2, x = 9 (q) y = 6, y = 8 (r) x = 7, x = 8
(s) m = −7, m = 8 (t) y = −16, y = −6 (u) k = −4, k = 22
(v) x = 2, x = 36 (w) x = −17, x = 3 (x) y = −20, y = −12
(y) g = −4, g = 16 (z) y = −11
Question 3
(a) y = −5, y = 5 (b) x = −2, x = 2 (c) m = −9, m = 9
Question 4
(a) x = −3, x = 3 (b) y = −10, y = 10 (c) w = −1, w = 1
(d) k = −12, k = 12 (e) x = −8, x = 8 (f) c = −0.5, c = 0.5
Question 5
(a) x = −1 (b) y = −7, y = −1 (c) y = 3, y = 4
(d) y = −12, y = −1 (e) x = −2, x = 5 (f) x = 7
(g) x = 3 (h) x = −14, x = 15
Question 6
(a) x = 1, x = 5 (b) x = −5, x = 3 (c) x = −9, x = 5
Apply
Question 1:
(a) x² − 3x − 180 = 0
(b) Alex is 15
Question 2: 180m
Question 3: height = 17cm, base = 10cm
Question 4: 15 and 12
Question 5: 36cm
Question 6:
(a) x² + x² + (x² + 15x) + (x² + 15x) + (x² + 15x) + (x² + 15x)
6x² + 60x = 3600
x² + 10x = 600
x² + 10x − 600 = 0
(b) x = 20
(c) 14000cm³
Question 7: x = 7 or x = 11
Question 8:
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