Eli says that the solutions to x^2+100=0 are 10 and -10 because 10^2 is 100. what error did eli make?

The answer would be an imaginary number because, using only real numbers, you cannot find the . So, Eli forgot to retain the negative or forgot you cannot solve .

Step-by-step explanation:

Even though 10^2 does equal 100, it does not satisfy the equation given:

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204