450x^2 y^5 3000x^4 y^3 look at what's common on each exponent first. for x it would be x^2 and y would be y^1 then divide the x by 150 which is common for both. 150x^2 then for the y you can't do anything else so your answer is 150x^2 y^1 *NOTE: anything to the first power isn't visible so your answer is 150x^2 y Read this slow and go step by step. Hope you understand and hope this help answer your question. :)
