Tweeterm als gem. factor (3)

Hoofdmenu Eentje per keer  🖨

Zonder de gemeenschappelijke tweeterm af en 'kuis op'.

1. \((y+7)(y+8)-(5y+1)(y+7)\)
2. \((s-7)(s+8)-(3s+9)(s-7)\)
3. \((5q+7)^2+(15q+21)\)
4. \((7a-9)^2-(14a-18)\)
5. \((x-3)(x+6)+(3x+2)(x-3)\)
6. \((s+7)(s-3)+(4s-5)(s+7)\)
7. \((6s+2)(s-5)-(6s+2)(5s-7)\)
8. \((8a+1)^2-(40a+5)\)
9. \((9a+1)^2+(36a+4)\)
10. \((8s+5)(s-9)+(8s+5)(3s-6)\)
11. \((3q+9)(q-3)-(3q+9)(4q-4)\)
12. \((6s-5)^2+(12s-10)\)

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Zonder de gemeenschappelijke tweeterm af en 'kuis op'.

Verbetersleutel

1. \((y+7)(y+8)-(5y+1)(y+7)\\=(y+7)(y+8-5y-1)\\=(y+7)(-4y+7)\)
2. \((s-7)(s+8)-(3s+9)(s-7)\\=(s-7)(s+8-3s-9)\\=(s-7)(-2s-1)\)
3. \((5q+7)^2+(15q+21)\\=(5q+7)(5q+7)+3(5q+7)\\=(5q+10)(5q+7)\)
4. \((7a-9)^2-(14a-18)\\=(7a-9)(7a-9)-2(7a-9)\\=(7a-11)(7a-9)\)
5. \((x-3)(x+6)+(3x+2)(x-3)\\=(x-3)(x+6+3x+2)\\=(x-3)(4x+8)\)
6. \((s+7)(s-3)+(4s-5)(s+7)\\=(s+7)(s-3+4s-5)\\=(s+7)(5s-8)\)
7. \((6s+2)(s-5)-(6s+2)(5s-7)\\=(6s+2)(s-5-5s+7)\\=(6s+2)(-4s+2)\)
8. \((8a+1)^2-(40a+5)\\=(8a+1)(8a+1)-5(8a+1)\\=(8a-4)(8a+1)\)
9. \((9a+1)^2+(36a+4)\\=(9a+1)(9a+1)+4(9a+1)\\=(9a+5)(9a+1)\)
10. \((8s+5)(s-9)+(8s+5)(3s-6)\\=(8s+5)(s-9+3s-6)\\=(8s+5)(4s-15)\)
11. \((3q+9)(q-3)-(3q+9)(4q-4)\\=(3q+9)(q-3-4q+4)\\=(3q+9)(-3q+1)\)
12. \((6s-5)^2+(12s-10)\\=(6s-5)(6s-5)+2(6s-5)\\=(6s-3)(6s-5)\)