129 degrees you just add DCE and ECF together
-9x(5 - 2x) Distribute/multiply 9x into (5 - 2x)
(-9x)5 - (-9x)2x
-45x - (-18x²) 2 negative signs cancel each other out and become +
-45x + 18x² Your answer is A ( the first option)
Umm.. I have to see the problems, we might not have the same textbooks so
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