Lettervormen distributiviteit

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Bereken

1. \(2(-x+2xy+4)\)
2. \(-2(-2xy-4y+1)\)
3. \(-2(-8a-2)\)
4. \(-2(-2xy-y+3)\)
5. \(-(-3b+1)\)
6. \(-(-7x-1)\)
7. \(+(2x-4y+4)\)
8. \(+(3x-2xy+1)\)
9. \(-(2y-1)\)
10. \(3(-8a-2)\)
11. \(-(xy-3y+3)\)
12. \(-2(-y+2)\)

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Bereken

Verbetersleutel

1. \(2(-x+2xy+4)=-2x+4xy+8\)
2. \(-2(-2xy-4y+1)=4xy+8y-2\)
3. \(-2(-8a-2)=16a+4\)
4. \(-2(-2xy-y+3)=4xy+2y-6\)
5. \(-(-3b+1)=3b-1\)
6. \(-(-7x-1)=7x+1\)
7. \(+(2x-4y+4)=2x-4y+4\)
8. \(+(3x-2xy+1)=3x-2xy+1\)
9. \(-(2y-1)=-2y+1\)
10. \(3(-8a-2)=-24a-6\)
11. \(-(xy-3y+3)=-xy+3y-3\)
12. \(-2(-y+2)=2y-4\)