Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((x+2)(x-9)-(4x-3)(x+2)\)
- \((6b-5)^2+(24b-20)\)
- \((9b+7)^2+(27b+21)\)
- \((8b+7)^2+(24b+21)\)
- \((3q-5)(q+4)+(3q-5)(4q-2)\)
- \((8a+3)^2-(16a+6)\)
- \((3y-8)^2+(9y-24)\)
- \((x+6)(x+3)-(2x+2)(x+6)\)
- \((7x+1)^2-(21x+3)\)
- \((5a+4)^2-(25a+20)\)
- \((7q-4)(q-7)-(7q-4)(2q-4)\)
- \((q-8)(q+8)+(4q-6)(q-8)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((x+2)(x-9)-(4x-3)(x+2)\\=(x+2)(x-9-4x+3)\\=(x+2)(-3x-6)\)
- \((6b-5)^2+(24b-20)\\=(6b-5)(6b-5)+4(6b-5)\\=(6b-1)(6b-5)\)
- \((9b+7)^2+(27b+21)\\=(9b+7)(9b+7)+3(9b+7)\\=(9b+10)(9b+7)\)
- \((8b+7)^2+(24b+21)\\=(8b+7)(8b+7)+3(8b+7)\\=(8b+10)(8b+7)\)
- \((3q-5)(q+4)+(3q-5)(4q-2)\\=(3q-5)(q+4+4q-2)\\=(3q-5)(5q+2)\)
- \((8a+3)^2-(16a+6)\\=(8a+3)(8a+3)-2(8a+3)\\=(8a+1)(8a+3)\)
- \((3y-8)^2+(9y-24)\\=(3y-8)(3y-8)+3(3y-8)\\=(3y-5)(3y-8)\)
- \((x+6)(x+3)-(2x+2)(x+6)\\=(x+6)(x+3-2x-2)\\=(x+6)(-x+1)\)
- \((7x+1)^2-(21x+3)\\=(7x+1)(7x+1)-3(7x+1)\\=(7x-2)(7x+1)\)
- \((5a+4)^2-(25a+20)\\=(5a+4)(5a+4)-5(5a+4)\\=(5a-1)(5a+4)\)
- \((7q-4)(q-7)-(7q-4)(2q-4)\\=(7q-4)(q-7-2q+4)\\=(7q-4)(-q-3)\)
- \((q-8)(q+8)+(4q-6)(q-8)\\=(q-8)(q+8+4q-6)\\=(q-8)(5q+2)\)