Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((7x-6)^2-(28x-24)\)
- \((b+9)(b+5)-(4b+3)(b+9)\)
- \((7a-2)(a-1)+(7a-2)(2a+6)\)
- \((3x+6)(x+3)+(3x+6)(2x-8)\)
- \((4b+7)^2-(20b+35)\)
- \((y+8)(y-6)-(2y+8)(y+8)\)
- \((6p+5)^2+(12p+10)\)
- \((3s+7)^2-(6s+14)\)
- \((8s-5)(s+4)+(8s-5)(5s+2)\)
- \((a-4)(a-9)-(2a+5)(a-4)\)
- \((7p+8)(p-1)-(7p+8)(3p-1)\)
- \((s-9)(s+8)+(4s+1)(s-9)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((7x-6)^2-(28x-24)\\=(7x-6)(7x-6)-4(7x-6)\\=(7x-10)(7x-6)\)
- \((b+9)(b+5)-(4b+3)(b+9)\\=(b+9)(b+5-4b-3)\\=(b+9)(-3b+2)\)
- \((7a-2)(a-1)+(7a-2)(2a+6)\\=(7a-2)(a-1+2a+6)\\=(7a-2)(3a+5)\)
- \((3x+6)(x+3)+(3x+6)(2x-8)\\=(3x+6)(x+3+2x-8)\\=(3x+6)(3x-5)\)
- \((4b+7)^2-(20b+35)\\=(4b+7)(4b+7)-5(4b+7)\\=(4b+2)(4b+7)\)
- \((y+8)(y-6)-(2y+8)(y+8)\\=(y+8)(y-6-2y-8)\\=(y+8)(-y-14)\)
- \((6p+5)^2+(12p+10)\\=(6p+5)(6p+5)+2(6p+5)\\=(6p+7)(6p+5)\)
- \((3s+7)^2-(6s+14)\\=(3s+7)(3s+7)-2(3s+7)\\=(3s+5)(3s+7)\)
- \((8s-5)(s+4)+(8s-5)(5s+2)\\=(8s-5)(s+4+5s+2)\\=(8s-5)(6s+6)\)
- \((a-4)(a-9)-(2a+5)(a-4)\\=(a-4)(a-9-2a-5)\\=(a-4)(-a-14)\)
- \((7p+8)(p-1)-(7p+8)(3p-1)\\=(7p+8)(p-1-3p+1)\\=(7p+8)(-2p+0)\)
- \((s-9)(s+8)+(4s+1)(s-9)\\=(s-9)(s+8+4s+1)\\=(s-9)(5s+9)\)