Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((9x+7)^2+(18x+14)\)
- \((3s-4)(s-9)-(3s-4)(4s+9)\)
- \((4a+3)^2+(16a+12)\)
- \((5y+6)(y+8)+(5y+6)(2y+9)\)
- \((s-8)(s+7)+(2s-4)(s-8)\)
- \((b+6)(b+8)+(2b+8)(b+6)\)
- \((5x+9)(x-5)-(5x+9)(4x-3)\)
- \((5a-7)^2+(20a-28)\)
- \((5y-5)(y-5)-(5y-5)(2y+9)\)
- \((b+2)(b-3)+(2b-6)(b+2)\)
- \((8p+1)^2+(24p+3)\)
- \((p-6)(p+8)+(2p-1)(p-6)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((9x+7)^2+(18x+14)\\=(9x+7)(9x+7)+2(9x+7)\\=(9x+9)(9x+7)\)
- \((3s-4)(s-9)-(3s-4)(4s+9)\\=(3s-4)(s-9-4s-9)\\=(3s-4)(-3s-18)\)
- \((4a+3)^2+(16a+12)\\=(4a+3)(4a+3)+4(4a+3)\\=(4a+7)(4a+3)\)
- \((5y+6)(y+8)+(5y+6)(2y+9)\\=(5y+6)(y+8+2y+9)\\=(5y+6)(3y+17)\)
- \((s-8)(s+7)+(2s-4)(s-8)\\=(s-8)(s+7+2s-4)\\=(s-8)(3s+3)\)
- \((b+6)(b+8)+(2b+8)(b+6)\\=(b+6)(b+8+2b+8)\\=(b+6)(3b+16)\)
- \((5x+9)(x-5)-(5x+9)(4x-3)\\=(5x+9)(x-5-4x+3)\\=(5x+9)(-3x-2)\)
- \((5a-7)^2+(20a-28)\\=(5a-7)(5a-7)+4(5a-7)\\=(5a-3)(5a-7)\)
- \((5y-5)(y-5)-(5y-5)(2y+9)\\=(5y-5)(y-5-2y-9)\\=(5y-5)(-y-14)\)
- \((b+2)(b-3)+(2b-6)(b+2)\\=(b+2)(b-3+2b-6)\\=(b+2)(3b-9)\)
- \((8p+1)^2+(24p+3)\\=(8p+1)(8p+1)+3(8p+1)\\=(8p+4)(8p+1)\)
- \((p-6)(p+8)+(2p-1)(p-6)\\=(p-6)(p+8+2p-1)\\=(p-6)(3p+7)\)