1) f(x)= 3(2x+4)
6x+12
2) g(x)= (5x+9)(x-3)
(5x^2)-15x+9x-27
(5x^2)-6x-27
3) h(x)= (2x+4)^2
(2x+4)(2x+4)
(4x^2)+8x+8x+16
(4x^2)+16x+16
4) k(x)=(7x-5)^2
(7x-5)(7x-5)
(49x^2)-35x-35x+25
(49x^2)-70x+25
voilà, j'espère t'avoir aider.
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1) f(x)= 3(2x+4)
6x+12
2) g(x)= (5x+9)(x-3)
(5x^2)-15x+9x-27
(5x^2)-6x-27
3) h(x)= (2x+4)^2
(2x+4)(2x+4)
(4x^2)+8x+8x+16
(4x^2)+16x+16
4) k(x)=(7x-5)^2
(7x-5)(7x-5)
(49x^2)-35x-35x+25
(49x^2)-70x+25
voilà, j'espère t'avoir aider.