- What is the solution of the equation x^2+8x=4?

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Simplify : (4x^(-6))^(-3/2)? The variables x and y vary inversely, and y=20 when x=-14. Write an equation that relates x and y. Then find y when x=-4.? What does T1 mean in T1-TiSe2 ? Titanium diselenide? Factor the polynomial function over the complex numbers.? In calculus when integrating using u substitution how do you determine what u should be? Especially in a rations that it is not easy to tell?