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haydoc1025
31.08.2020 •
Mathematics
Factor this trinomial 4x^2-6x-10 If you can please try to show me how to do it.
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Ответ:
Step-by-step explanation:
So we have the trinomial:
First, factor out a 2:
Now, factor within the parentheses.
To do so, we want to find two numbers. When multiplied, these two numbers must equal (a)(c) and when added, they must equal b
(a)(c) is 2(-5) or -10 and b is -3. So, we want two numbers that when multiplied together gives -10 and when added gives -3.
-5 and 2 works. Therefore:
Replace -3x with 2x and -5x:
Factor out a 2x for the first two terms. And factor out a negative 5 for the remaining two:
Grouping:
And we're done!
Ответ:
(72) + (7x + 24) = 180
72 + 7x + 24 = 180
Like every equation, make sure to combine all like terms.
7x + 96=180
7x = 84
In order to achieve the value of x alone, divide both sides by 7.
x = 84/7
Final x = 12