n² - 10n + 24 = 0
You need two numbers that multiply to equal 24.
They have to add to equal -10.
-6 times -4 is 24
-6 plus -4 is -10
Your answer is (n - 6)(n - 4).
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40n2 + 40n = 40n(n + 1) ------------------ That is as factored as far I can see it being factored.
a + b + 4 is in its simplest form.
The only prime factor of 49 is seven (7).
49 is a factor of 343. 49 is 72 343 is 73
39 3,13