75
If y2 = y + 7, then what is the value of y3?
- A8y + 7
- By + 14
- Cy + 2
- D4y + 7
Answer not set
Discussion 1
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CCommunity
Given y2 = y + 7
Multiplying LHS and RHS by y
⇒ y3 = y2 + 7y
∴ y3 = y + 7 + 7y = 8y + 7 [? y2 = y + 7]
Multiplying LHS and RHS by y
⇒ y3 = y2 + 7y
∴ y3 = y + 7 + 7y = 8y + 7 [? y2 = y + 7]