Given: x + y = 10If x= -21, what is y?
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<em>Greetings from Brasil...</em>
The area of a square is given by the expression: A = L² <em>(where L is the side length)</em>
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A cube has 6 sides and each side is a square. So the surface area of a cube will be 6x the area of a square of this cube.
<h3>Acube = 6L²</h3>
and now, we can rationalize the denominator by using its conjugate and difference of squares.