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Gretchen Medhurst
Wiki User
∙ 9y agoNONE.
This is a method used in factoring by grouping.
Let's solve this methodically: First, list all of the factors of 24, making sure not to forget negatives (two negatives multiply to a positive):
1 x 24, -1 x -24,
2 x 12, -2 x -12,
3 x 8, -3 x -8
4 x 6, -4 x -6
Now look at the list, adding all of the pairs together as you look at them.
As you can see, no pairs add to 19. Thus, if you are factoring a number, you must use wither the quadratic formula or completing the square. When factoring by grouping, fractions are NOT used.
___________________________
XY = 24. .......... 1
X+ Y = -19 ....... 2
From 2; Y = -19 - X
Substitute in 1; then:
X (-19 - X) = 24
X2 + 19X + 24 = 0
Solve for X then substitute in eq 2 to get Y value.
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What two prime numbers equals to 19?
If you're talking about which two prime numbers added together equals to 19, then the answer is 2 and 17. They are both prime numbers, and they add up to be 19.
What to numbers multiply to make 95?
They are: 5*19 = 95
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1 and 19
