`(A+B)^2=A^2+2AB+B^2`
VD :
`1)(x+2)^2=x^2+4x+4`
`2)(2x+2)^2=4x^2+8x+4`
`3)(x+3)^2=x^2+6x+9`
`4)(3x+4)^2=9x^2+24x+16`
`5)(x+7)^2=x^2+14x+49`
`6)(4x+4)^2=16x^2+32x+16`
`7)(x+5)^2=x^2+10x+25`
`8)(2x+4)^2=4x^2+16x+16`
`9)(6x+4)^2=36x^2+48x+16`
`10)(x+1)^2=x^2+2x+1`
`(A-B)^2=A^2-2AB+B^2`
VD :
`1)(x-2)^2=x^2-4x+4`
`2)(2x-2)^2=4x^2-8x+4`
`3)(x-3)^2=x^2-6x+9`
`4)(3x-4)^2=9x^2-24x+16`
`5)(x-7)^2=x^2-14x+49`
`6)(4x-4)^2=16x^2-32x+16`
`7)(x-5)^2=x^2-10x+25`
`8)(2x-4)^2=4x^2-16x+16`
`9)(6x-4)^2=36x^2-48x+16`
`10)(x-1)^2=x^2-2x+1`
`A^2-B^2=(A+B)(A-B)`
`1)4x^2-4=(2x-2)(2x+2)`
`2)x^2-9=(x-3)(x+3)` `
`3)16x^2-9=(4x-3)(4x+3)`
`4)4x^2-81=(2x-9)(2x+9)`
`5)x^2-81=(x-9)(x+9)`
`6)36x^2-91=(6x-9)(6x+9)`
`7)x^2-49=(x-7)(x+7)`
`8)x^2-25=(x-5)(x+5)`
`9)49x^2-49=(7x-7)(7x+7)`
`10)x^2-4=(x-2)(x+2)`
