- How exactly is the idea of a wormhole scientifically sound?

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Solve using algebraic approach? Using the equation f(x) = (x+2) (x+1)³ (x-1)² (x-2) i need to expand it into standard form. please help? If a pair of number cubes is rolled two times in row what is the probability that the sum of the numbers thrown is 4 both times? Chemistry neon? I have been told that gravity pulled pieces of rocks together in outer space to form the earth.I thought there wasn't any gravity there.?