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प्रश्न
Solve the cubic equations:
8x3 – 2x2 – 7x + 3 = 0
उत्तर
Sum of the alternative coefficients are equal
8 – 7 = – 2 + 3
1 = 1
∴ (x + 1) is a factor.
8x2 – 10x + 3 = 0
(4x – 3)(2x – 1) = 0
4x = 3 or 2x = 1
x = `3/4` or `1/2`
∴ The roots are `3/4, 1/2, -1`
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