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Marinap041744
@Marinap041744
July 2022
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ПОМОГИТЕ ПОЖАЛУЙСТА!
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asya1993
Надо раскрыть скобки и упростить:
2)(3х+1)+(-3х^2-3x+1)=3x+1-3x^2-3x+1=-3x^2+2
3)(a+3b)+(3a-3b)=a+3b+3a-3b=4a
4)a^2-5ab-b^2-(a^2+b^2)=a^2-5ab-b^2-a^2-b^2=-5ab-2b^2
5)(x+y-z)-(x-y)+(x-y+z)=x+y-z-x+y+x-y+z=x+y
1 votes
Thanks 1
Marinap041744
Спасибо)
asya1993
не за что
Nata9911
2. (3x + 1) + (-3x^2 - 3x + 1) = 3x + 1 - 3x^2 - 3x + 1 = -3x^2 + 1.
3. (a + 3b) + (3a - 3b) = a + 3b + 3a - 3b = 4a.
4. a^2 - 5ab - b^2 - (a^2 + b^2) = a^2 - 5ab - b^2 - a^2 - b^2 = -2b^2 - 5ab.
5. (x + y - z) - (x - y) + ( x - y + z) = x + y - z - x + y + x - y + z = x + y.
1 votes
Thanks 0
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Answers & Comments
2)(3х+1)+(-3х^2-3x+1)=3x+1-3x^2-3x+1=-3x^2+2
3)(a+3b)+(3a-3b)=a+3b+3a-3b=4a
4)a^2-5ab-b^2-(a^2+b^2)=a^2-5ab-b^2-a^2-b^2=-5ab-2b^2
5)(x+y-z)-(x-y)+(x-y+z)=x+y-z-x+y+x-y+z=x+y
3. (a + 3b) + (3a - 3b) = a + 3b + 3a - 3b = 4a.
4. a^2 - 5ab - b^2 - (a^2 + b^2) = a^2 - 5ab - b^2 - a^2 - b^2 = -2b^2 - 5ab.
5. (x + y - z) - (x - y) + ( x - y + z) = x + y - z - x + y + x - y + z = x + y.