1)15а⁵\6:30а⁴\6=(15а⁵*6):6*30а⁴=а\2
(17а⁵)(3а)=51а⁶
8с₂\15в*в⁶\4с=2св⁵\15
18ав\с:9а\с=18авс\9ас=2в
(-5ав⁵)²=25а²в¹⁰
2) 0,9(-10)²-120=0,9*100-120=90-120=-30
3)(а+3)²=а²+6а+9
(а-3)(а+3)=а²-9
(2а-1)²=4а²-4а+1
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1)15а⁵\6:30а⁴\6=(15а⁵*6):6*30а⁴=а\2
(17а⁵)(3а)=51а⁶
8с₂\15в*в⁶\4с=2св⁵\15
18ав\с:9а\с=18авс\9ас=2в
(-5ав⁵)²=25а²в¹⁰
2) 0,9(-10)²-120=0,9*100-120=90-120=-30
3)(а+3)²=а²+6а+9
(а-3)(а+3)=а²-9
(2а-1)²=4а²-4а+1