Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((p+6)(p+4)-(2p+3)(p+6)\)
- \((3b-2)^2+(9b-6)\)
- \((4p+5)(p-9)-(4p+5)(5p-6)\)
- \((a-3)(a-7)-(3a-9)(a-3)\)
- \((y-3)(y-6)-(2y+2)(y-3)\)
- \((5x+5)(x-3)+(5x+5)(4x-5)\)
- \((3b-2)(b+1)+(3b-2)(4b+4)\)
- \((4x-3)^2+(8x-6)\)
- \((9s-8)^2-(45s-40)\)
- \((5y+2)(y-5)-(5y+2)(2y+2)\)
- \((s+8)(s-9)+(3s+9)(s+8)\)
- \((a-2)(a-4)-(3a+7)(a-2)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((p+6)(p+4)-(2p+3)(p+6)\\=(p+6)(p+4-2p-3)\\=(p+6)(-p+1)\)
- \((3b-2)^2+(9b-6)\\=(3b-2)(3b-2)+3(3b-2)\\=(3b+1)(3b-2)\)
- \((4p+5)(p-9)-(4p+5)(5p-6)\\=(4p+5)(p-9-5p+6)\\=(4p+5)(-4p-3)\)
- \((a-3)(a-7)-(3a-9)(a-3)\\=(a-3)(a-7-3a+9)\\=(a-3)(-2a+2)\)
- \((y-3)(y-6)-(2y+2)(y-3)\\=(y-3)(y-6-2y-2)\\=(y-3)(-y-8)\)
- \((5x+5)(x-3)+(5x+5)(4x-5)\\=(5x+5)(x-3+4x-5)\\=(5x+5)(5x-8)\)
- \((3b-2)(b+1)+(3b-2)(4b+4)\\=(3b-2)(b+1+4b+4)\\=(3b-2)(5b+5)\)
- \((4x-3)^2+(8x-6)\\=(4x-3)(4x-3)+2(4x-3)\\=(4x-1)(4x-3)\)
- \((9s-8)^2-(45s-40)\\=(9s-8)(9s-8)-5(9s-8)\\=(9s-13)(9s-8)\)
- \((5y+2)(y-5)-(5y+2)(2y+2)\\=(5y+2)(y-5-2y-2)\\=(5y+2)(-y-7)\)
- \((s+8)(s-9)+(3s+9)(s+8)\\=(s+8)(s-9+3s+9)\\=(s+8)(4s+0)\)
- \((a-2)(a-4)-(3a+7)(a-2)\\=(a-2)(a-4-3a-7)\\=(a-2)(-2a-11)\)