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OpenStudy (anonymous):
I need help with two equations! It's review that I haven't done in months and am terribly confused. (7x^3 - 5x +2) - (5x^3 - 4x^2 +6x -7) and this one is factoring: x^2 - 7x - 30
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OpenStudy (akashdeepdeb):
2) Find 2 numbers that multiply to 30 but add/subtract up/down to 7! In this case 10 and -3 right?
OpenStudy (akashdeepdeb):
Put it in the equation x2 - (10-3)x - 30! Then open the brackets and group the terms! [IT WOULD BE FACTOISED] :)
OpenStudy (anonymous):
Thank you!
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