if, x^2+1/9^2=25/36 then x^3+ 1/27^3 = ?
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Step-by-step explanation:
x²+(1÷9x²) = 25÷36
x² + ( 1÷3x)² + 2 × x × (1÷3x) = 25÷36 + 2÷3
(x+(1÷3x))² = 49÷36
x+(1÷3x) = 7÷6
x³ + (1÷27x³) = (x + (1÷3x))×(x² – (1÷3) + (1÷3x) ²)
= (7÷6) × ((25÷36) – (1÷3))
= (7/6)×(13/36)
= 91/216
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misty24:
i have some problem on the second part can u please slove on paper?
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