-
If 
2x + 2 
= 4, then the value of 27x³ + 1 is : 9x 27x³
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- 180
- 198
- 234
- 252
Correct Option: B
| ∵ 2x + | = 4 | |
| 9x |
On dividing both sides by 2,
| x + | = 6 | |
| 3x |
On multiplying both sides by 3,
| 3x + | | ³ | = 6³ | ||
| 3x |
On cubing both sides,
| ∴ 27x³ + | + 3 × 3x × | | 3x + | | = 216 | |||
| 27x³ | 3x | 3x |
| ⇒ 27x³ + | + 3 × 6 = 216 | |
| 27x³ |
| ⇒ 27x³ + | = 216 - 18 | |
| 27x³ |
= 198
