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Answer:
(vi) Option b
(vii) Option c
(viii) Option c
(ix) Option d
(x) Option a
Explanation:
(vi) (a - 7)(a + 2) = a² + 2a - 7a - (7)(2) = a² - 5a - 14
Option b is the correct answer.
(vii) -2 will be sum when the greater number is negative and the smaller number is positive.
-11 + 9 = -2 and (-11) x (9) = -99
Hence, option c is the correct answer.
(viii) x² + (a +b)x + ab
= x² + ax + bx + ab
= x (x + a) + b (x + a)
= (x + a)(x + b)
Option c is the correct answer.
(ix) x² - 10x + 21
= x² - 7x - 3x + 21
= x (x - 7) -3 (x - 7)
= (x - 7)(x - 3)
Option d is the correct answer.
(x) p² + 6p - 16
= p² + 8p - 2p - 16
= p (p + 8) -2 (p + 8)
= (p + 8)(p - 2)
Option a is the correct answer.
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Answer:
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