4) If \alpha, \beta are the roots of $y^2 - 2y - 7 = 0$ then find the value of 1) $\alpha^2 + \beta^2$ 2) $\alpha^3 + \beta^3$

          4) If \alpha, \beta are the roots of $y^2 - 2y - 7 = 0$ then find the value of

1) $\alpha^2 + \beta^2$
2) $\alpha^3 + \beta^3$

Alan S. Tussy, R. David Gustafson 5th Edition

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