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13. Find the sum of 2a + 3b2, 5a? - 2b2 + ab and - 6a2 - 5 ab + b2. (a) a² + 3b - 6ab (b) 2a + 2b2 - 3ab (c) 2b2 - 6ab (d) a + 2b2-4ab​

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-STEP EXPLANATION:hopeeee itttttttt helpssssssssss



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