- Resolve into factors x^4+8x^2+144 can anyone tell me solution?

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Express 4.0x10^5x3.0x10^3 in scientific notation? Determine each of the following for a 0.180 M HBr solution: [H3O+], pH, pOH. I missed lecture today so please be detailed :)? What is 4 cos^4(x) + 4 sin^4(x) - cos(4x) after simplification? What is the [H+] of a solution if the [OH-] = 3.8 x 10-5? Please explain a history of the Raman Effect and Raman Spectroscopy?