Answer:
-x^{2} + 2x + 9x2 + 5
-x²+2x + 18 + 5
-x²+ 2x + 23
-(-x²+ 2x + 23)-
= x² - 2x - 23
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Answer:
-x^{2} + 2x + 9x2 + 5
-x²+2x + 18 + 5
-x²+ 2x + 23
-(-x²+ 2x + 23)-
= x² - 2x - 23