Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((7b+7)(b+2)-(7b+7)(2b-8)\)
- \((3q-5)(q+7)-(3q-5)(4q+5)\)
- \((a+2)(a+7)-(2a-2)(a+2)\)
- \((y-1)(y+5)-(5y-3)(y-1)\)
- \((7p+5)^2-(14p+10)\)
- \((7b-4)(b-5)+(7b-4)(2b+9)\)
- \((5q-1)(q+2)+(5q-1)(3q+4)\)
- \((b+6)(b-9)-(5b+4)(b+6)\)
- \((7s+3)(s+6)-(7s+3)(4s+9)\)
- \((8b-8)(b-7)-(8b-8)(5b-6)\)
- \((2b+1)^2-(10b+5)\)
- \((x+2)(x-6)-(4x+8)(x+2)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((7b+7)(b+2)-(7b+7)(2b-8)\\=(7b+7)(b+2-2b+8)\\=(7b+7)(-b+10)\)
- \((3q-5)(q+7)-(3q-5)(4q+5)\\=(3q-5)(q+7-4q-5)\\=(3q-5)(-3q+2)\)
- \((a+2)(a+7)-(2a-2)(a+2)\\=(a+2)(a+7-2a+2)\\=(a+2)(-a+9)\)
- \((y-1)(y+5)-(5y-3)(y-1)\\=(y-1)(y+5-5y+3)\\=(y-1)(-4y+8)\)
- \((7p+5)^2-(14p+10)\\=(7p+5)(7p+5)-2(7p+5)\\=(7p+3)(7p+5)\)
- \((7b-4)(b-5)+(7b-4)(2b+9)\\=(7b-4)(b-5+2b+9)\\=(7b-4)(3b+4)\)
- \((5q-1)(q+2)+(5q-1)(3q+4)\\=(5q-1)(q+2+3q+4)\\=(5q-1)(4q+6)\)
- \((b+6)(b-9)-(5b+4)(b+6)\\=(b+6)(b-9-5b-4)\\=(b+6)(-4b-13)\)
- \((7s+3)(s+6)-(7s+3)(4s+9)\\=(7s+3)(s+6-4s-9)\\=(7s+3)(-3s-3)\)
- \((8b-8)(b-7)-(8b-8)(5b-6)\\=(8b-8)(b-7-5b+6)\\=(8b-8)(-4b-1)\)
- \((2b+1)^2-(10b+5)\\=(2b+1)(2b+1)-5(2b+1)\\=(2b-4)(2b+1)\)
- \((x+2)(x-6)-(4x+8)(x+2)\\=(x+2)(x-6-4x-8)\\=(x+2)(-3x-14)\)