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प्रश्न
Multiply: 2m2 − 3m − 1 and 4m2 − m − 1
बेरीज
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उत्तर
(2m2 − 3m − 1) (4m2 − m − 1)
= 2m2(4m2 − m − 1) − 3m(4m2 − m − 1) −1(4m2 − m −1)
= 8m4 − 2m3− 2m2 − 12m3 + 3m2 + 3m − 4m2 + m + 1
= 8m4 − 14m3 − 6m2 + 3m2 + 4m + 1
= 8m4 − 14m3 − 3m2 + 4m + 1
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Complete the table of products.
|
First monomial→ |
2x |
–5y |
3x2 |
–4xy |
7x2y |
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|
Second monomial ↓ |
||||||
| 2x | 4x2 | ... | ... | ... | ... | ... |
| –5y | ... | ... | –15x2y | ... | ... | ... |
| 3x2 | ... | ... | ... | ... | ... | ... |
| – 4xy | ... | ... | ... | ... | ... | ... |
| 7x2y | ... | ... | ... | ... | ... | ... |
| –9x2y2 | ... | ... | ... | ... | ... | ... |
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