Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((3y+1)^2+(12y+4)\)
- \((x-4)(x+6)+(2x-1)(x-4)\)
- \((3q-7)(q+8)+(3q-7)(4q+7)\)
- \((5b+7)(b-2)-(5b+7)(2b-2)\)
- \((3s+4)(s-5)+(3s+4)(2s+7)\)
- \((4s-9)(s+5)-(4s-9)(5s+7)\)
- \((q+5)(q+7)-(4q+1)(q+5)\)
- \((p-5)(p+1)+(3p+1)(p-5)\)
- \((8a+9)(a+8)+(8a+9)(3a+9)\)
- \((p-3)(p+3)+(2p+8)(p-3)\)
- \((8x+1)^2-(16x+2)\)
- \((5a-4)^2-(10a-8)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((3y+1)^2+(12y+4)\\=(3y+1)(3y+1)+4(3y+1)\\=(3y+5)(3y+1)\)
- \((x-4)(x+6)+(2x-1)(x-4)\\=(x-4)(x+6+2x-1)\\=(x-4)(3x+5)\)
- \((3q-7)(q+8)+(3q-7)(4q+7)\\=(3q-7)(q+8+4q+7)\\=(3q-7)(5q+15)\)
- \((5b+7)(b-2)-(5b+7)(2b-2)\\=(5b+7)(b-2-2b+2)\\=(5b+7)(-b+0)\)
- \((3s+4)(s-5)+(3s+4)(2s+7)\\=(3s+4)(s-5+2s+7)\\=(3s+4)(3s+2)\)
- \((4s-9)(s+5)-(4s-9)(5s+7)\\=(4s-9)(s+5-5s-7)\\=(4s-9)(-4s-2)\)
- \((q+5)(q+7)-(4q+1)(q+5)\\=(q+5)(q+7-4q-1)\\=(q+5)(-3q+6)\)
- \((p-5)(p+1)+(3p+1)(p-5)\\=(p-5)(p+1+3p+1)\\=(p-5)(4p+2)\)
- \((8a+9)(a+8)+(8a+9)(3a+9)\\=(8a+9)(a+8+3a+9)\\=(8a+9)(4a+17)\)
- \((p-3)(p+3)+(2p+8)(p-3)\\=(p-3)(p+3+2p+8)\\=(p-3)(3p+11)\)
- \((8x+1)^2-(16x+2)\\=(8x+1)(8x+1)-2(8x+1)\\=(8x-1)(8x+1)\)
- \((5a-4)^2-(10a-8)\\=(5a-4)(5a-4)-2(5a-4)\\=(5a-6)(5a-4)\)