Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((3x-6)(x-2)-(3x-6)(4x+2)\)
- \((q-3)(q+8)+(4q-9)(q-3)\)
- \((x-9)(x-4)-(4x-4)(x-9)\)
- \((4s+2)(s+1)+(4s+2)(3s+2)\)
- \((3a+7)(a-3)-(3a+7)(2a-9)\)
- \((7b+1)(b+7)+(7b+1)(4b-3)\)
- \((y-9)(y+7)-(4y-5)(y-9)\)
- \((3p+3)(p-6)-(3p+3)(2p+7)\)
- \((8q-7)^2-(40q-35)\)
- \((2y-3)(y+1)-(2y-3)(3y-5)\)
- \((4p+5)^2+(12p+15)\)
- \((9y-4)^2+(45y-20)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((3x-6)(x-2)-(3x-6)(4x+2)\\=(3x-6)(x-2-4x-2)\\=(3x-6)(-3x-4)\)
- \((q-3)(q+8)+(4q-9)(q-3)\\=(q-3)(q+8+4q-9)\\=(q-3)(5q-1)\)
- \((x-9)(x-4)-(4x-4)(x-9)\\=(x-9)(x-4-4x+4)\\=(x-9)(-3x+0)\)
- \((4s+2)(s+1)+(4s+2)(3s+2)\\=(4s+2)(s+1+3s+2)\\=(4s+2)(4s+3)\)
- \((3a+7)(a-3)-(3a+7)(2a-9)\\=(3a+7)(a-3-2a+9)\\=(3a+7)(-a+6)\)
- \((7b+1)(b+7)+(7b+1)(4b-3)\\=(7b+1)(b+7+4b-3)\\=(7b+1)(5b+4)\)
- \((y-9)(y+7)-(4y-5)(y-9)\\=(y-9)(y+7-4y+5)\\=(y-9)(-3y+12)\)
- \((3p+3)(p-6)-(3p+3)(2p+7)\\=(3p+3)(p-6-2p-7)\\=(3p+3)(-p-13)\)
- \((8q-7)^2-(40q-35)\\=(8q-7)(8q-7)-5(8q-7)\\=(8q-12)(8q-7)\)
- \((2y-3)(y+1)-(2y-3)(3y-5)\\=(2y-3)(y+1-3y+5)\\=(2y-3)(-2y+6)\)
- \((4p+5)^2+(12p+15)\\=(4p+5)(4p+5)+3(4p+5)\\=(4p+8)(4p+5)\)
- \((9y-4)^2+(45y-20)\\=(9y-4)(9y-4)+5(9y-4)\\=(9y+1)(9y-4)\)