The square of a number is 12 less than 7 times the number. what is the number?

Which of the following is the result of expanding the series

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2