Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
- \((s+5)(s-8)+(5s-7)(s+5)\)
- \((2q+5)^2-(8q+20)\)
- \((2q+7)^2+(10q+35)\)
- \((2s+1)^2+(10s+5)\)
- \((5x-5)(x+4)-(5x-5)(4x-4)\)
- \((9x-2)^2+(45x-10)\)
- \((p-3)(p+5)-(3p+1)(p-3)\)
- \((5y-5)(y+8)+(5y-5)(2y-5)\)
- \((5s-2)^2+(20s-8)\)
- \((b-3)(b-8)+(3b-8)(b-3)\)
- \((5b+5)(b+9)-(5b+5)(4b+7)\)
- \((8p+2)(p+9)+(8p+2)(5p+3)\)
Zonder de gemeenschappelijke tweeterm af en 'kuis op'.
Verbetersleutel
- \((s+5)(s-8)+(5s-7)(s+5)\\=(s+5)(s-8+5s-7)\\=(s+5)(6s-15)\)
- \((2q+5)^2-(8q+20)\\=(2q+5)(2q+5)-4(2q+5)\\=(2q+1)(2q+5)\)
- \((2q+7)^2+(10q+35)\\=(2q+7)(2q+7)+5(2q+7)\\=(2q+12)(2q+7)\)
- \((2s+1)^2+(10s+5)\\=(2s+1)(2s+1)+5(2s+1)\\=(2s+6)(2s+1)\)
- \((5x-5)(x+4)-(5x-5)(4x-4)\\=(5x-5)(x+4-4x+4)\\=(5x-5)(-3x+8)\)
- \((9x-2)^2+(45x-10)\\=(9x-2)(9x-2)+5(9x-2)\\=(9x+3)(9x-2)\)
- \((p-3)(p+5)-(3p+1)(p-3)\\=(p-3)(p+5-3p-1)\\=(p-3)(-2p+4)\)
- \((5y-5)(y+8)+(5y-5)(2y-5)\\=(5y-5)(y+8+2y-5)\\=(5y-5)(3y+3)\)
- \((5s-2)^2+(20s-8)\\=(5s-2)(5s-2)+4(5s-2)\\=(5s+2)(5s-2)\)
- \((b-3)(b-8)+(3b-8)(b-3)\\=(b-3)(b-8+3b-8)\\=(b-3)(4b-16)\)
- \((5b+5)(b+9)-(5b+5)(4b+7)\\=(5b+5)(b+9-4b-7)\\=(5b+5)(-3b+2)\)
- \((8p+2)(p+9)+(8p+2)(5p+3)\\=(8p+2)(p+9+5p+3)\\=(8p+2)(6p+12)\)