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x2 + 7x - 5 = 0 has no solution in integers. To find the roots the formula is:

-b +/- sqrt(b2 - 4ac) all over 2a. In your equation a = 1, b = 7 and c = -5

= (-7 +/- sqrt(49 + 20))/2

= (-7 +/- Sqrt 69)/2

= (-7 +/- 8.307)/2

= 1.307/2 or -15.307/2

= 0.653 or -7.653, both of which check out within three-thousandths when you use them as x in the original equation

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14y ago
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Q: Give exact and approximate solutions to three decimal places x2 plus 7x-5 equals 0?
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