Evaluate expression W/O Calculator

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Curious3141

Homework Helper

S.R said:

I didn't notice that; thanks!

x^3-6x-20=0

(x-2)(x^2+2x+10) = 0

The only real solution is x=2.

Yeah, well done! :approve:

EDIT: Small correction: the equation should've been x^3 + 6x - 20 = 0. Small matter, just a typo.

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