Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((q-7)(q+1)+(2q-8)(q-7)\)
- \((3q+9)(q-6)+(3q+9)(5q-1)\)
- \((q-5)^2-(3q-15)\)
- \((a+5)(a-7)-(2a+5)(a+5)\)
- \((p-4)(p+7)-(3p-3)(p-4)\)
- \((5x-2)^2+(25x-10)\)
- \((3p+3)(p+7)-(3p+3)(4p+9)\)
- \((p+5)(p+3)+(2p-8)(p+5)\)
- \((q-6)(q-5)+(3q-6)(q-6)\)
- \((x-1)(x+7)-(5x-5)(x-1)\)
- \((7q+1)(q+3)+(7q+1)(3q-6)\)
- \((3b+8)^2+(12b+32)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((q-7)(q+1)+(2q-8)(q-7)\\=(q-7)(q+1+2q-8)\\=(q-7)(3q-7)\)
- \((3q+9)(q-6)+(3q+9)(5q-1)\\=(3q+9)(q-6+5q-1)\\=(3q+9)(6q-7)\)
- \((q-5)^2-(3q-15)\\=(q-5)(q-5)-3(q-5)\\=(q-8)(q-5)\)
- \((a+5)(a-7)-(2a+5)(a+5)\\=(a+5)(a-7-2a-5)\\=(a+5)(-a-12)\)
- \((p-4)(p+7)-(3p-3)(p-4)\\=(p-4)(p+7-3p+3)\\=(p-4)(-2p+10)\)
- \((5x-2)^2+(25x-10)\\=(5x-2)(5x-2)+5(5x-2)\\=(5x+3)(5x-2)\)
- \((3p+3)(p+7)-(3p+3)(4p+9)\\=(3p+3)(p+7-4p-9)\\=(3p+3)(-3p-2)\)
- \((p+5)(p+3)+(2p-8)(p+5)\\=(p+5)(p+3+2p-8)\\=(p+5)(3p-5)\)
- \((q-6)(q-5)+(3q-6)(q-6)\\=(q-6)(q-5+3q-6)\\=(q-6)(4q-11)\)
- \((x-1)(x+7)-(5x-5)(x-1)\\=(x-1)(x+7-5x+5)\\=(x-1)(-4x+12)\)
- \((7q+1)(q+3)+(7q+1)(3q-6)\\=(7q+1)(q+3+3q-6)\\=(7q+1)(4q-3)\)
- \((3b+8)^2+(12b+32)\\=(3b+8)(3b+8)+4(3b+8)\\=(3b+12)(3b+8)\)