Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((4y-3)^2+(12y-9)\)
- \((s+6)(s-2)+(3s-5)(s+6)\)
- \((7s-9)^2+(21s-27)\)
- \((2p+5)(p-7)+(2p+5)(3p+5)\)
- \((3q+1)(q+8)+(3q+1)(4q-9)\)
- \((3b-2)(b-8)-(3b-2)(4b+2)\)
- \((3x-5)^2+(12x-20)\)
- \((3q-1)(q-1)-(3q-1)(5q+5)\)
- \((3b-3)(b+8)-(3b-3)(2b+3)\)
- \((s-1)(s+2)+(4s+8)(s-1)\)
- \((4b+1)^2+(8b+2)\)
- \((b-6)(b-8)-(5b-1)(b-6)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((4y-3)^2+(12y-9)\\=(4y-3)(4y-3)+3(4y-3)\\=(4y+0)(4y-3)\)
- \((s+6)(s-2)+(3s-5)(s+6)\\=(s+6)(s-2+3s-5)\\=(s+6)(4s-7)\)
- \((7s-9)^2+(21s-27)\\=(7s-9)(7s-9)+3(7s-9)\\=(7s-6)(7s-9)\)
- \((2p+5)(p-7)+(2p+5)(3p+5)\\=(2p+5)(p-7+3p+5)\\=(2p+5)(4p-2)\)
- \((3q+1)(q+8)+(3q+1)(4q-9)\\=(3q+1)(q+8+4q-9)\\=(3q+1)(5q-1)\)
- \((3b-2)(b-8)-(3b-2)(4b+2)\\=(3b-2)(b-8-4b-2)\\=(3b-2)(-3b-10)\)
- \((3x-5)^2+(12x-20)\\=(3x-5)(3x-5)+4(3x-5)\\=(3x-1)(3x-5)\)
- \((3q-1)(q-1)-(3q-1)(5q+5)\\=(3q-1)(q-1-5q-5)\\=(3q-1)(-4q-6)\)
- \((3b-3)(b+8)-(3b-3)(2b+3)\\=(3b-3)(b+8-2b-3)\\=(3b-3)(-b+5)\)
- \((s-1)(s+2)+(4s+8)(s-1)\\=(s-1)(s+2+4s+8)\\=(s-1)(5s+10)\)
- \((4b+1)^2+(8b+2)\\=(4b+1)(4b+1)+2(4b+1)\\=(4b+3)(4b+1)\)
- \((b-6)(b-8)-(5b-1)(b-6)\\=(b-6)(b-8-5b+1)\\=(b-6)(-4b-7)\)