а) 2а(х+5)+4b(х+5) = (2a+4b)(x+5)=2(a+2b)(x+5)
б) 2а(х-4)-4аb(х-4) = (2a-4ab)(x-4) = 2a(1-2b)(x-4)
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Answers & Comments
а) 2а(х+5)+4b(х+5) = (2a+4b)(x+5)=2(a+2b)(x+5)
б) 2а(х-4)-4аb(х-4) = (2a-4ab)(x-4) = 2a(1-2b)(x-4)