Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((2q+1)^2+(6q+3)\)
- \((y+8)^2-(5y+40)\)
- \((7q-3)^2+(21q-9)\)
- \((7b+1)^2+(14b+2)\)
- \((3y-3)(y+5)-(3y-3)(4y+2)\)
- \((s+9)(s-9)+(2s+1)(s+9)\)
- \((8s+8)(s-4)-(8s+8)(3s-4)\)
- \((2a+7)^2-(6a+21)\)
- \((2b+3)(b+5)-(2b+3)(3b+2)\)
- \((9p+5)^2-(27p+15)\)
- \((6p-5)^2+(24p-20)\)
- \((4b-7)^2+(20b-35)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((2q+1)^2+(6q+3)\\=(2q+1)(2q+1)+3(2q+1)\\=(2q+4)(2q+1)\)
- \((y+8)^2-(5y+40)\\=(y+8)(y+8)-5(y+8)\\=(y+3)(y+8)\)
- \((7q-3)^2+(21q-9)\\=(7q-3)(7q-3)+3(7q-3)\\=(7q+0)(7q-3)\)
- \((7b+1)^2+(14b+2)\\=(7b+1)(7b+1)+2(7b+1)\\=(7b+3)(7b+1)\)
- \((3y-3)(y+5)-(3y-3)(4y+2)\\=(3y-3)(y+5-4y-2)\\=(3y-3)(-3y+3)\)
- \((s+9)(s-9)+(2s+1)(s+9)\\=(s+9)(s-9+2s+1)\\=(s+9)(3s-8)\)
- \((8s+8)(s-4)-(8s+8)(3s-4)\\=(8s+8)(s-4-3s+4)\\=(8s+8)(-2s+0)\)
- \((2a+7)^2-(6a+21)\\=(2a+7)(2a+7)-3(2a+7)\\=(2a+4)(2a+7)\)
- \((2b+3)(b+5)-(2b+3)(3b+2)\\=(2b+3)(b+5-3b-2)\\=(2b+3)(-2b+3)\)
- \((9p+5)^2-(27p+15)\\=(9p+5)(9p+5)-3(9p+5)\\=(9p+2)(9p+5)\)
- \((6p-5)^2+(24p-20)\\=(6p-5)(6p-5)+4(6p-5)\\=(6p-1)(6p-5)\)
- \((4b-7)^2+(20b-35)\\=(4b-7)(4b-7)+5(4b-7)\\=(4b-2)(4b-7)\)