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प्रश्न
Use the direct method to evaluate the following products:
(5a + 16) (3a – 7)
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उत्तर
(5a + 16) (3a – 7)
= (5a × 3a) + (5a × −7) + (16 × 3a) + 16 × (−7)
= (15a2) + (−35a) + 48a + (−112)
= 15a2 − 35a + 48a − 112
= 15a2 + 13a − 112
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