1) (2m-9n)(d-10)
2) (4d-13m)(9+2x)
3) (2b+9d)(z+16)
4) (3y+5z)(11+2x)
5) 227n+132
6) 95b+16
7) (z+20m)(x+6)
8) 3(42+29z)
9) -7(12y-13)
10) (x-7)(z+16d)
Для вычисления значений выражений надо подставлять числа вместо букв и считать:
![1)a+0,5b^3=20+0,5(-4)^3=20+0,5(-64)=52\\2)-0,4x^3+y=-0,4\cdot 5^3+(-10)=-0,4\cdot 125-10=-50-10=-60\\3)a-2b+c=1,3-2(-0,6)-3,5=1,3+1,2-3,5=2,5-3,5=-1\\4)x-y-3z=2,4-(-0,6)-3(-1,1)=2,4+0,6+3,3=3+3,3=6,3\\5)2y^2+y+3=2(-\frac{1}{4})^2-\frac{1}{4}+3=2\cdot \frac{1}{16}-\frac{1}{4}+3=\frac{1}{8}-\frac{1}{4}+3=\frac{1-2+24}{8}=\frac{23}{8}=2\frac{7}{8}](https://tex.z-dn.net/?f=1%29a%2B0%2C5b%5E3%3D20%2B0%2C5%28-4%29%5E3%3D20%2B0%2C5%28-64%29%3D52%5C%5C2%29-0%2C4x%5E3%2By%3D-0%2C4%5Ccdot+5%5E3%2B%28-10%29%3D-0%2C4%5Ccdot+125-10%3D-50-10%3D-60%5C%5C3%29a-2b%2Bc%3D1%2C3-2%28-0%2C6%29-3%2C5%3D1%2C3%2B1%2C2-3%2C5%3D2%2C5-3%2C5%3D-1%5C%5C4%29x-y-3z%3D2%2C4-%28-0%2C6%29-3%28-1%2C1%29%3D2%2C4%2B0%2C6%2B3%2C3%3D3%2B3%2C3%3D6%2C3%5C%5C5%292y%5E2%2By%2B3%3D2%28-%5Cfrac%7B1%7D%7B4%7D%29%5E2-%5Cfrac%7B1%7D%7B4%7D%2B3%3D2%5Ccdot+%5Cfrac%7B1%7D%7B16%7D-%5Cfrac%7B1%7D%7B4%7D%2B3%3D%5Cfrac%7B1%7D%7B8%7D-%5Cfrac%7B1%7D%7B4%7D%2B3%3D%5Cfrac%7B1-2%2B24%7D%7B8%7D%3D%5Cfrac%7B23%7D%7B8%7D%3D2%5Cfrac%7B7%7D%7B8%7D)
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