4(2a + b)^2 – (a - b)^2
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Answer:
3(5a²+ b²+6ab)
Step-by-step explanation:
4(2a + b)^2 – (a - b)^2
4(4a²+b²+4ab)-(a²+b²-2ab)
16a²+4b²+16ab-a²-b²+2ab
15a²+3b²+18ab
3(5a²+ b²+6ab)
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