Запишите в ответ номера верных равенств:
1) (4-b)(b+4) = b^2 - 16
2) -(b-1)(3-4b) = (1-b)(4b-3)
3) (b+1)(3-2b) = 3+b-2b^2
4) (b-4)^2 = b^2 - 8b +16
1) (4-b)(b+4) = b^2 - 16
2) -(b-1)(3-4b) = (1-b)(4b-3)
3) (b+1)(3-2b) = 3+b-2b^2
4) (b-4)^2 = b^2 - 8b +16
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2) да
3) да
4) да