2007-11-18 21:47:34 · 4 answers · asked by toddinav 1 in Science & Mathematics ➔ Mathematics
x² - x - 30 = ( x + 5 ) * ( x - 6 )
2007-11-18 21:51:18 · answer #1 · answered by Ben 3 · 0⤊ 0⤋
(x-6)(x+5).
The way to solve such questions is to look for factors that multiply to the constant term - in this case 30, so look at 2 and 15, and 3 and 10, and 5 and 6. Choose the one where the difference is the coefficient of the x term. In this case -1. So -6 and +5 spring to mind - hence the answer....
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2007-11-18 21:55:12 · answer #2 · answered by tsr21 6 · 0⤊ 1⤋
what is (x to the 2nd)-x-30 factored out to?
-aNs..
15..??
2007-11-18 22:13:36 · answer #3 · answered by Anonymous · 0⤊ 2⤋
x² - x - 30 = (x - 6) (x + 5)
Check
x² + 5x - 6x - 30
x² - x - 30 (as required)
2007-11-19 00:03:14 · answer #4 · answered by Como 7 · 1⤊ 1⤋