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Mathematics
Pamela
21 March, 14:09
What are the solutions to this equation X^2+3x=10
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Reina Villarreal
21 March, 17:09
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To find the solutions, subtract 10 from both sides so that the equation is equal to zero: x^2 + 3x - 10 = 0
Now, find two numbers that multiply together to get - 10, but add to get 3.
These two numbers would be 5 and - 2.
We rewrite the equation like this: x^2 + 5x - 2x - 10
Put them into two separate problems:
(x^2 + 5x) and (-2x - 10)
Factor them:
x (x + 5) and - 2 (x + 5)
Both of them have (x+5) in common, so we can rewrite this problem as
(x-2) (x+5) = 0
We now have (x-2) = 0 and (x+5) = 0
The solutions are 2 and - 5
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