SOLUTION: 1. (2x² + 3x – 1) + (5x² - 5x – 5)

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Question 321243: 1. (2x² + 3x – 1) + (5x² - 5x – 5)
Answer by checkley77(12844) About Me  (Show Source):
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1. (2x² + 3x – 1) + (5x² - 5x – 5)
7x^2-2x-6
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x=(2+-sqrt[2^2-4*7*-6])/2*7
x=(2+-sqrt4+168])/14
x=(2+-sqrt172)/14
x=(2+-13.115)/14
x=(2+13.115)/14
x=15.115/14
x=1.08 ans.
x=(2-13.115)/2
x=-11.115/14
x=-.8 ans.