August 2022 1 7 Report
даю 30 баллов, помогите решить, упростить выражения:
а) (6х + 5)^2 - (4x+5)^2
б) (2х - 3у)^2 - (5x+7y)^2
в) (3a + 2b)^2 - (7a-6b)^2
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