Maths Equation - Urgent Help Needed Watch

Mills98
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Could anybody solve this equation?: x² - 6x - 39 = 0

If it helps, I think the answer is 6.56 to 3 significant figures. I just want to know how to get there.

Thanks for any help given.
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Munrot07
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quadratic formula x = (-b +/- root(b^2 - 4ac))/(2a)
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TenOfThem
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(Original post by Mills98)
Could anybody solve this equation?: x² - 6x - 39 = 0

If it helps, I think the answer is 6.56 to 3 significant figures. I just want to know how to get there.

Thanks for any help given.
Complete the square

Or use the formula
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Kallisto
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(Original post by Mills98)
Could anybody solve this equation?: x² - 6x - 39 = 0

If it helps, I think the answer is 6.56 to 3 significant figures. I just want to know how to get there. (...)
Its a quadratic equation, so use the pq-formula to get the results.
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tsumannai
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You could also complete the square if you wanted to.
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brianeverit
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(Original post by Mills98)
Could anybody solve this equation?: x² - 6x - 39 = 0

If it helps, I think the answer is 6.56 to 3 significant figures. I just want to know how to get there.

Thanks for any help given.
Solution of ax^2+bx+c=0 \mathrm{\ is\ }x=\frac{-b\pm\sqrt(b^2-4ac)}{2a}
and you have a=1,b=-6 and c=-39
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