1
Question
(−9) × 6 + (−9) × 4 = ?
(a) −90
(b) 90
(c) −18
(d) 18
(a) −90
(b) 90
(c) −18
(d) 18
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Solution
(a) –90
(−9) × 6 + (−9) × 4
Using distributive law:
(−9) × (6 + 4)
= (−9) × (10)
= −90
(−9) × 6 + (−9) × 4
Using distributive law:
(−9) × (6 + 4)
= (−9) × (10)
= −90
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