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0DeanWinchester0
@0DeanWinchester0
August 2022
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Помогите пожалуйста очень срочно...не поняла тему...
17.16-17.20 (в,г)
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hlopushinairina
17.16
5x·2y+3x·6y+2x·7y=10xy+18xy+14xy=42xy;
3y²x+6x·3y·2y+2yxy=3y²x+36xy²+2y²x=41y²x;
-11ab+a·8·b+5ab=-11ab+8ab+5ab=-11ab+13ab=2ab;
ab²+9abb+3bab+abb=ab²+9ab²+3ab²+ab²=14ab²;
17.17
3a²b+7a·9ba+10b·3a²(-1)=3a²b+63a²b-30a²b=36a²b;
x²y²·7+19x·2xyy-9x·3yxy=x²y²+38x²y²-27x²y²=12x²y²;
az³+7az³-6z·2az²-5az³=az³+7az³-12az³-5az³=-9az³;
m⁸n⁴+2m³·3m⁵n⁴-7m⁸n⁴=m⁸n⁴+6m⁸n⁴-7m⁸n⁴=0
17.18. 0.5x+0.4x=9 ⇒0.9x=9⇒x=9/0.9=10;
(1/3)·x+(1/4)·x-(1/12)x=5 ⇒ (4x+3x-x)/12=5 ⇒
6x=60⇒x=60/6=10
17.20 7x³-5x³=-54 ⇒2x³=-54
x³=-27 ;⇒x=∛-27=-3;
2 votes
Thanks 3
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Answers & Comments
5x·2y+3x·6y+2x·7y=10xy+18xy+14xy=42xy;
3y²x+6x·3y·2y+2yxy=3y²x+36xy²+2y²x=41y²x;
-11ab+a·8·b+5ab=-11ab+8ab+5ab=-11ab+13ab=2ab;
ab²+9abb+3bab+abb=ab²+9ab²+3ab²+ab²=14ab²;
17.17
3a²b+7a·9ba+10b·3a²(-1)=3a²b+63a²b-30a²b=36a²b;
x²y²·7+19x·2xyy-9x·3yxy=x²y²+38x²y²-27x²y²=12x²y²;
az³+7az³-6z·2az²-5az³=az³+7az³-12az³-5az³=-9az³;
m⁸n⁴+2m³·3m⁵n⁴-7m⁸n⁴=m⁸n⁴+6m⁸n⁴-7m⁸n⁴=0
17.18. 0.5x+0.4x=9 ⇒0.9x=9⇒x=9/0.9=10;
(1/3)·x+(1/4)·x-(1/12)x=5 ⇒ (4x+3x-x)/12=5 ⇒
6x=60⇒x=60/6=10
17.20 7x³-5x³=-54 ⇒2x³=-54
x³=-27 ;⇒x=∛-27=-3;