factorize a^2+4b^2-3a-4b-4ab
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Answer:
a²+4b²−3a+6b−4ab
=a²−4ab+(2b)² −3a+6b
=a² −2(a)(2b)+(2b)²−3(a−2b)
=(a−2b)²−3(a−2b)
=(a−2b)(a−2b−3)
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