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OpenStudy (anonymous):
Correct ? Simplify (4x2 - 2x + 5) + (2x2 - 2x - 8) 6x^2 - 4x + 13
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OpenStudy (anonymous):
The "+13" is not correct.
OpenStudy (anonymous):
+5 + (-8) is 5 - 8 so it's not 13 but -3 if it was +5 - (-8) it wouldve been 5 + 8 = 13 keep track of the signs!
OpenStudy (anonymous):
6x2 - 4x - 3
OpenStudy (anonymous):
Yes
Directrix (directrix):
I concur with Fruitless75 --> 6 x^2 - 4x - 3
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