Ответ:
[tex](b-4)^2 = b^2-8b+16\\(2x+1)^2 = 4x^2+4x+1\\(3 + x)^2 = 9 + x + x^2\\(a+7x)^2 = a^2+14x+49x^2[/tex]
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Ответ:
[tex](b-4)^2 = b^2-8b+16\\(2x+1)^2 = 4x^2+4x+1\\(3 + x)^2 = 9 + x + x^2\\(a+7x)^2 = a^2+14x+49x^2[/tex]