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There are two distinct solutions x to the equation 18 + 5x^2 = 80x. If each solution is rounded to the nearest integer, and then these two integers are multiplied together, what is the result?

Feb 2, 2022

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What is the result?

Hello Guest!

$$18 + 5x^2 = 80x\ |\ /5\\ x^2-16x+3.6=0\\ x=8\pm \sqrt{64-3.6}=8\pm 7.772\\ x\in \{15.772,0.228\}$$

$$16\cdot 0=0$$

The result is Null.

!

Feb 2, 2022