Sagot :
☺ Salut ☻
[tex]\rule{0.5cm}{1mm}DEVELOPPER \: ET \: REDUIRE \rule{0.5cm}{1mm}[/tex]
[tex]\boxed{(2x-1)(2x+1)}[/tex]
[tex]\boxed{(2x)^{2}-1^{2}}[/tex]
[tex]\boxed{\boxed{\blue{4x^{2}-1}}}[/tex]
[tex]\\[/tex]
[tex]\boxed{(6x-6)^{2}}[/tex]
[tex]\boxed{(6x)^{2}-2\times 6x\times 6 + 6^{2}}[/tex]
[tex]\boxed{\boxed{\blue{36x^{2}-72x+36}}}[/tex]
[tex]\\[/tex]
[tex]\boxed{(7x+2)(3x+6)}[/tex]
[tex]\boxed{7x\times 3x + 7x\times 6 + 2\times 3x + 2\times 6}[/tex]
[tex]\boxed{21x^{2}+42x+6x+12}[/tex]
[tex]\boxed{\boxed{\blue{21x^{2}+48x+12}}}[/tex]
[tex]\\[/tex]
[tex]\boxed{(-7x+1)(-6x-5)}[/tex]
[tex]\boxed{-7x\times (-6x) -7x\times (-5) +1\times (-6x) +1\times (-5x)}[/tex]
[tex]\boxed{42x^{2}+35x-6x-5}[/tex]
[tex]\boxed{\boxed{\blue{42x^{2}+29x-5}}}[/tex]
[tex]\rule{6cm}{1mm}[/tex]
