Tweeterm als gem. factor (3)

Hoofdmenu Eentje per keer  🖨

Zonder de gemeenschappelijke tweeterm af en 'kuis op'.

1. \((a-9)(a+7)-(2a+2)(a-9)\)
2. \((6a+5)^2-(30a+25)\)
3. \((q-3)(q-5)-(4q+9)(q-3)\)
4. \((7q-6)(q+5)+(7q-6)(5q-4)\)
5. \((8y+5)^2+(40y+25)\)
6. \((6s-5)^2-(30s-25)\)
7. \((8s+1)^2-(40s+5)\)
8. \((y+6)(y+3)+(5y-5)(y+6)\)
9. \((3x-3)(x+8)-(3x-3)(4x+4)\)
10. \((5b-4)(b-7)+(5b-4)(2b+8)\)
11. \((s-1)(s-4)-(3s+1)(s-1)\)
12. \((9s+1)^2+(27s+3)\)

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Zonder de gemeenschappelijke tweeterm af en 'kuis op'.

Verbetersleutel

1. \((a-9)(a+7)-(2a+2)(a-9)\\=(a-9)(a+7-2a-2)\\=(a-9)(-a+5)\)
2. \((6a+5)^2-(30a+25)\\=(6a+5)(6a+5)-5(6a+5)\\=(6a+0)(6a+5)\)
3. \((q-3)(q-5)-(4q+9)(q-3)\\=(q-3)(q-5-4q-9)\\=(q-3)(-3q-14)\)
4. \((7q-6)(q+5)+(7q-6)(5q-4)\\=(7q-6)(q+5+5q-4)\\=(7q-6)(6q+1)\)
5. \((8y+5)^2+(40y+25)\\=(8y+5)(8y+5)+5(8y+5)\\=(8y+10)(8y+5)\)
6. \((6s-5)^2-(30s-25)\\=(6s-5)(6s-5)-5(6s-5)\\=(6s-10)(6s-5)\)
7. \((8s+1)^2-(40s+5)\\=(8s+1)(8s+1)-5(8s+1)\\=(8s-4)(8s+1)\)
8. \((y+6)(y+3)+(5y-5)(y+6)\\=(y+6)(y+3+5y-5)\\=(y+6)(6y-2)\)
9. \((3x-3)(x+8)-(3x-3)(4x+4)\\=(3x-3)(x+8-4x-4)\\=(3x-3)(-3x+4)\)
10. \((5b-4)(b-7)+(5b-4)(2b+8)\\=(5b-4)(b-7+2b+8)\\=(5b-4)(3b+1)\)
11. \((s-1)(s-4)-(3s+1)(s-1)\\=(s-1)(s-4-3s-1)\\=(s-1)(-2s-5)\)
12. \((9s+1)^2+(27s+3)\\=(9s+1)(9s+1)+3(9s+1)\\=(9s+4)(9s+1)\)