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How do you solve 8n2-5n-11 equals 8?

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Anonymous

∙ 14y ago
Updated: 9/18/2023

8n2 - 5n - 11 = 8

8n2 - 5n - 19 = 0

This cannot be factorised so use the quadratic formula:

n = [5 +/- sqrt(52 + 4*8*19)]/(2*8)

= [5 +/- sqrt(25 + 608)]/16

= [5 +/- sqrt(633)]/16

= [5 +/- sqrt(25.1595)]/16

= -1.25997 or 1.88497

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∙ 14y ago
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