What number should be added to both sides of the equation to complete the square? x2 + 3x = 6
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What is the ratio for the surface areas of rectangle prisims shown below given that they are similar and that the ratio of their edge lengths is 7: 3

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

What is not true about kl and mn? what is mn? (show your work)