Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((y+3)^2-(4y+12)\)
- \((4b+1)^2+(8b+2)\)
- \((p+8)(p+5)-(4p+4)(p+8)\)
- \((x+3)(x+8)+(2x+3)(x+3)\)
- \((7q+5)^2+(21q+15)\)
- \((2s-5)(s-5)-(2s-5)(5s-6)\)
- \((5x+6)^2-(10x+12)\)
- \((3q-8)(q-5)-(3q-8)(4q+6)\)
- \((3s-5)(s-3)+(3s-5)(4s-9)\)
- \((8p+6)(p+3)-(8p+6)(3p+3)\)
- \((s+9)(s-2)-(4s+7)(s+9)\)
- \((9s+7)^2-(27s+21)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((y+3)^2-(4y+12)\\=(y+3)(y+3)-4(y+3)\\=(y-1)(y+3)\)
- \((4b+1)^2+(8b+2)\\=(4b+1)(4b+1)+2(4b+1)\\=(4b+3)(4b+1)\)
- \((p+8)(p+5)-(4p+4)(p+8)\\=(p+8)(p+5-4p-4)\\=(p+8)(-3p+1)\)
- \((x+3)(x+8)+(2x+3)(x+3)\\=(x+3)(x+8+2x+3)\\=(x+3)(3x+11)\)
- \((7q+5)^2+(21q+15)\\=(7q+5)(7q+5)+3(7q+5)\\=(7q+8)(7q+5)\)
- \((2s-5)(s-5)-(2s-5)(5s-6)\\=(2s-5)(s-5-5s+6)\\=(2s-5)(-4s+1)\)
- \((5x+6)^2-(10x+12)\\=(5x+6)(5x+6)-2(5x+6)\\=(5x+4)(5x+6)\)
- \((3q-8)(q-5)-(3q-8)(4q+6)\\=(3q-8)(q-5-4q-6)\\=(3q-8)(-3q-11)\)
- \((3s-5)(s-3)+(3s-5)(4s-9)\\=(3s-5)(s-3+4s-9)\\=(3s-5)(5s-12)\)
- \((8p+6)(p+3)-(8p+6)(3p+3)\\=(8p+6)(p+3-3p-3)\\=(8p+6)(-2p+0)\)
- \((s+9)(s-2)-(4s+7)(s+9)\\=(s+9)(s-2-4s-7)\\=(s+9)(-3s-9)\)
- \((9s+7)^2-(27s+21)\\=(9s+7)(9s+7)-3(9s+7)\\=(9s+4)(9s+7)\)