Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((8a+1)^2-(24a+3)\)
- \((5x-9)^2+(10x-18)\)
- \((4q-3)^2-(20q-15)\)
- \((y+1)(y+3)+(4y+4)(y+1)\)
- \((y+5)(y-7)+(3y+5)(y+5)\)
- \((3s-6)(s-7)+(3s-6)(4s-9)\)
- \((5y+3)^2+(25y+15)\)
- \((7s+9)(s-5)-(7s+9)(4s+7)\)
- \((2b+3)^2+(4b+6)\)
- \((a+3)(a+5)-(2a-2)(a+3)\)
- \((4a+5)^2+(16a+20)\)
- \((7x+1)^2-(14x+2)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((8a+1)^2-(24a+3)\\=(8a+1)(8a+1)-3(8a+1)\\=(8a-2)(8a+1)\)
- \((5x-9)^2+(10x-18)\\=(5x-9)(5x-9)+2(5x-9)\\=(5x-7)(5x-9)\)
- \((4q-3)^2-(20q-15)\\=(4q-3)(4q-3)-5(4q-3)\\=(4q-8)(4q-3)\)
- \((y+1)(y+3)+(4y+4)(y+1)\\=(y+1)(y+3+4y+4)\\=(y+1)(5y+7)\)
- \((y+5)(y-7)+(3y+5)(y+5)\\=(y+5)(y-7+3y+5)\\=(y+5)(4y-2)\)
- \((3s-6)(s-7)+(3s-6)(4s-9)\\=(3s-6)(s-7+4s-9)\\=(3s-6)(5s-16)\)
- \((5y+3)^2+(25y+15)\\=(5y+3)(5y+3)+5(5y+3)\\=(5y+8)(5y+3)\)
- \((7s+9)(s-5)-(7s+9)(4s+7)\\=(7s+9)(s-5-4s-7)\\=(7s+9)(-3s-12)\)
- \((2b+3)^2+(4b+6)\\=(2b+3)(2b+3)+2(2b+3)\\=(2b+5)(2b+3)\)
- \((a+3)(a+5)-(2a-2)(a+3)\\=(a+3)(a+5-2a+2)\\=(a+3)(-a+7)\)
- \((4a+5)^2+(16a+20)\\=(4a+5)(4a+5)+4(4a+5)\\=(4a+9)(4a+5)\)
- \((7x+1)^2-(14x+2)\\=(7x+1)(7x+1)-2(7x+1)\\=(7x-1)(7x+1)\)