Ответ:
1) x²+7x -x -7= x²+6x-7
2) a²b²-4a⁴-4b⁴+16a²b²= 17a²b²-4a⁴-4b⁴
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Ответ:
1) x²+7x -x -7= x²+6x-7
2) a²b²-4a⁴-4b⁴+16a²b²= 17a²b²-4a⁴-4b⁴