find the sum of the following expressions 3a^2-7ab-4b^2,-6a^2+9ab-3b^2,4a^2+ab+5b^2
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Answer:
a²+3ab-2b²
Step-by-step explanation:
3a²-7ab-4b²
+
-6a²+9ab-3b²
+
4a²+ab+5b²
________'_
a²+3ab-2b²
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