Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((2a+3)(a-4)+(2a+3)(3a-9)\)
- \((7x-6)^2-(35x-30)\)
- \((q-3)(q-1)-(2q-5)(q-3)\)
- \((y-6)(y-2)+(4y-1)(y-6)\)
- \((5p+1)^2+(25p+5)\)
- \((8a-7)^2-(32a-28)\)
- \((p+9)(p+2)-(4p+1)(p+9)\)
- \((b+7)(b+8)+(5b-9)(b+7)\)
- \((4s+4)(s-9)-(4s+4)(3s-1)\)
- \((6s-5)^2+(18s-15)\)
- \((5b-4)^2+(25b-20)\)
- \((3y+1)^2+(6y+2)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((2a+3)(a-4)+(2a+3)(3a-9)\\=(2a+3)(a-4+3a-9)\\=(2a+3)(4a-13)\)
- \((7x-6)^2-(35x-30)\\=(7x-6)(7x-6)-5(7x-6)\\=(7x-11)(7x-6)\)
- \((q-3)(q-1)-(2q-5)(q-3)\\=(q-3)(q-1-2q+5)\\=(q-3)(-q+4)\)
- \((y-6)(y-2)+(4y-1)(y-6)\\=(y-6)(y-2+4y-1)\\=(y-6)(5y-3)\)
- \((5p+1)^2+(25p+5)\\=(5p+1)(5p+1)+5(5p+1)\\=(5p+6)(5p+1)\)
- \((8a-7)^2-(32a-28)\\=(8a-7)(8a-7)-4(8a-7)\\=(8a-11)(8a-7)\)
- \((p+9)(p+2)-(4p+1)(p+9)\\=(p+9)(p+2-4p-1)\\=(p+9)(-3p+1)\)
- \((b+7)(b+8)+(5b-9)(b+7)\\=(b+7)(b+8+5b-9)\\=(b+7)(6b-1)\)
- \((4s+4)(s-9)-(4s+4)(3s-1)\\=(4s+4)(s-9-3s+1)\\=(4s+4)(-2s-8)\)
- \((6s-5)^2+(18s-15)\\=(6s-5)(6s-5)+3(6s-5)\\=(6s-2)(6s-5)\)
- \((5b-4)^2+(25b-20)\\=(5b-4)(5b-4)+5(5b-4)\\=(5b+1)(5b-4)\)
- \((3y+1)^2+(6y+2)\\=(3y+1)(3y+1)+2(3y+1)\\=(3y+3)(3y+1)\)