Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((7b-3)^2+(21b-9)\)
- \((s-5)(s-5)-(2s+7)(s-5)\)
- \((a+1)(a+5)-(3a+9)(a+1)\)
- \((p-8)(p-2)+(5p+3)(p-8)\)
- \((8s-7)(s-3)+(8s-7)(3s+6)\)
- \((p-2)(p+5)-(2p+1)(p-2)\)
- \((b+9)(b-4)+(2b-5)(b+9)\)
- \((6x-5)(x-7)+(6x-5)(5x-2)\)
- \((7x+4)(x-2)+(7x+4)(2x-1)\)
- \((5a+6)(a+8)-(5a+6)(4a+4)\)
- \((y-3)(y-4)-(3y-5)(y-3)\)
- \((p+9)(p+3)+(3p-5)(p+9)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((7b-3)^2+(21b-9)\\=(7b-3)(7b-3)+3(7b-3)\\=(7b+0)(7b-3)\)
- \((s-5)(s-5)-(2s+7)(s-5)\\=(s-5)(s-5-2s-7)\\=(s-5)(-s-12)\)
- \((a+1)(a+5)-(3a+9)(a+1)\\=(a+1)(a+5-3a-9)\\=(a+1)(-2a-4)\)
- \((p-8)(p-2)+(5p+3)(p-8)\\=(p-8)(p-2+5p+3)\\=(p-8)(6p+1)\)
- \((8s-7)(s-3)+(8s-7)(3s+6)\\=(8s-7)(s-3+3s+6)\\=(8s-7)(4s+3)\)
- \((p-2)(p+5)-(2p+1)(p-2)\\=(p-2)(p+5-2p-1)\\=(p-2)(-p+4)\)
- \((b+9)(b-4)+(2b-5)(b+9)\\=(b+9)(b-4+2b-5)\\=(b+9)(3b-9)\)
- \((6x-5)(x-7)+(6x-5)(5x-2)\\=(6x-5)(x-7+5x-2)\\=(6x-5)(6x-9)\)
- \((7x+4)(x-2)+(7x+4)(2x-1)\\=(7x+4)(x-2+2x-1)\\=(7x+4)(3x-3)\)
- \((5a+6)(a+8)-(5a+6)(4a+4)\\=(5a+6)(a+8-4a-4)\\=(5a+6)(-3a+4)\)
- \((y-3)(y-4)-(3y-5)(y-3)\\=(y-3)(y-4-3y+5)\\=(y-3)(-2y+1)\)
- \((p+9)(p+3)+(3p-5)(p+9)\\=(p+9)(p+3+3p-5)\\=(p+9)(4p-2)\)