- Find all zeros for the following polynomial f(x)=X^3+3x^2-9x-27?

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0.8 litres water is how many cups? If a+b+c=4, ab+ac+bc=6, and abc=3, what is 1/a + 1/b + 1/c? Describe how and where new crust material is made. Describe how and where old crust is destroyed.? Find all solutions to the following system of nonlinear equations.
(x − 2)^2 + y ^2 = 20
(x + 2)^2 + y^ 2 = 20? White light is directed at difraction grating at angle normal to gratting.starting at norml to grating 0dgre the odr of red,gren,blue wil be?