−2x
2
+4−7x
2
−4x+2−2+4x
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Answer:
-9x^2+4
Step-by-step explanation:
1. Find common variables
(-2x^2 - 7x^2)
(-4x +4x)
(4+2-2)
2. Simplify
(-9x^2)
0
4
Final Answer:
-9x^2+4