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Mathematics
Alivia Stephens
8 March, 05:30
Factor this trinomial.
x2 - 8x+15
+2
Answers (
2
)
Douglas Duarte
8 March, 06:25
0
(x - 5) (x - 3)
Step-by-step explanation:
You need two numbers that multiply to 15 and add to 8. There aren't many numbers that will do that.
15 and 1 is one pair of numbers. They multiply to 15 but don't add to 8.
6 and 2 add to 8 but don't multiply to 15.
5 and 3. This in some form is your answer, but handle it carefully.
(x - 5) (x - 3)
The 5 and 3 both have to be minus.
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Howard Buck
8 March, 07:26
0
(x-3) (x-5)
Step-by-step explanation:
The expression is:
x2 - 8x+15
Break the middle term:
Coefficient of first term will be multiplied by constant
1*15 = 15
Now we have to find out which numbers will be multiplied to get 15
and also by adding those numbers we get the middle term:
3*5=15
3+5 = 8
Now break the middle term:
x^2-3x-5x+15
x (x-3) - 5 (x-3)
(x-5) (x-3) ...
The factors are (x-5) (x-3) ...
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