Select the correct answer. The edges of a cube are 5 centimeters each and the diagonal of a face is approximately 7 centimeters.
What is the approximate area of the cross section passing through the diagonals of opposite faces of this cube? A. 12 square centimeters B. 25 square centimeters C. 35 square centimeters D. 49 square centimeters Reset Next
2 answers:
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If we have one zero of +5i, we also have to have its conjugate which is -5i. Therefore, the factors that we will FOIL to get that polynomial are (x+5i)(x-5i). That distribution results in 
. I'm sure by now you know that i squared is equal to -1, so -25(-1) = 25. So our polynomial is 