What are the exact solutions of $x^2 − 5x − 7 = 0$ ?

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Answer 1 · 2015-05-16T02:02:25

$y = x^2 - 5x - 7 = 0$

$D = d^2 = b^2 - 4ac = 25 + 28 = 53 -> d = +- sqr53$

$x = -b/(2a) +- d/(2a) = 5/2 +- (sqr53)/2$ = $(5 + sqr53)/2$

What are the exact solutions of x^2 − 5x − 7 = 0x^2 − 5x − 7 = 0?