1)(2а+5в )³=8а³+3*4а²*5в+3*2а* 25в²+(5в)³= =8а³+60а²в+3*2а* 25в²+(5в)³=
2)(3а -2в)³=(3а)³-3*(3а)²*2в+36ав²-8в³
3)(4а+в)³=64а³+3*16а²*в+12ав²+в³=64а³+48а²в+12ав²+в³
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1)(2а+5в )³=8а³+3*4а²*5в+3*2а* 25в²+(5в)³= =8а³+60а²в+3*2а* 25в²+(5в)³=
2)(3а -2в)³=(3а)³-3*(3а)²*2в+36ав²-8в³
3)(4а+в)³=64а³+3*16а²*в+12ав²+в³=64а³+48а²в+12ав²+в³