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олечка119
@олечка119
December 2021
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помогите пожалуйста 1,2
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tanyarakova23
№1
1)3^7 * 3^5=3^12
[1)5^2 * 5^9=5^11
2)4^9 * 4^6=4^3
[2)2^8 : 2^4=2^4
3)(2^2)^3=2^6
[3)(3^3)^2=3^6
4)3^7 * 5^7=(3 * 5)^7=15^7
[4)4^8 * 7^8=(4 * 7)^8=28^8
5)(a^3)^4 * a^2=a^12 * a^2=a^14
[5)(x^2)^5 : x^3=x^10 : x^3=x^7
№2
1)(4xy^2 - x + 2x^2y) - (2xy^2 + 3x + 2x^2y)=4xy^2 - x + 2x^2y - 2xy^2 - 3x - 2x^2y=2xy^2 - 4x
2)2a^2 * (a+3b) - 3b * (2a^2 + b^2)=2a^3 + 6a^2b - 6a^2b + 3b^3=2a^3 + 3b^3
[1)(5m^2y^3 + 3m^3y^2 - m) - (3m^2y^3 + 2m + 3m^3y^2)=5m^2y^3 + 3m^3y^2 - m - 3m^2y^3 - 2m - 3m^3y^2=2m^2y^3 - 3m
[2)3x^2 * (b+2x) - 2x * (2b^2x + 3x^2)=3bx^2 + 6x^3 - 4b^2x^2 - 6x^3=3bx^2 - 4b^2x^2
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Thanks 1
tanyarakova23
^ - это читается как "в степени такой-то"
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Answers & Comments
1)3^7 * 3^5=3^12
[1)5^2 * 5^9=5^11
2)4^9 * 4^6=4^3
[2)2^8 : 2^4=2^4
3)(2^2)^3=2^6
[3)(3^3)^2=3^6
4)3^7 * 5^7=(3 * 5)^7=15^7
[4)4^8 * 7^8=(4 * 7)^8=28^8
5)(a^3)^4 * a^2=a^12 * a^2=a^14
[5)(x^2)^5 : x^3=x^10 : x^3=x^7
№2
1)(4xy^2 - x + 2x^2y) - (2xy^2 + 3x + 2x^2y)=4xy^2 - x + 2x^2y - 2xy^2 - 3x - 2x^2y=2xy^2 - 4x
2)2a^2 * (a+3b) - 3b * (2a^2 + b^2)=2a^3 + 6a^2b - 6a^2b + 3b^3=2a^3 + 3b^3
[1)(5m^2y^3 + 3m^3y^2 - m) - (3m^2y^3 + 2m + 3m^3y^2)=5m^2y^3 + 3m^3y^2 - m - 3m^2y^3 - 2m - 3m^3y^2=2m^2y^3 - 3m
[2)3x^2 * (b+2x) - 2x * (2b^2x + 3x^2)=3bx^2 + 6x^3 - 4b^2x^2 - 6x^3=3bx^2 - 4b^2x^2