Упростить выражение:
1) (4b+10c) (10c-4b)+(-5+2b)(5c+2b)
2 (0.8x+15)(0.8x-15)+0.36x
Во втором примере 0.36x в квадрате. Просто не знаю как ставить квадрат.
Спасибо заранее!
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