bjr
x +7 => x + 7 * (-2) => -2 (x+7)
* = multiplié par
et
x * 7 => 7x - 11 => 7x - 11
x - 2 => x - 2 * (-3) => -3 (x - 2)
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bjr
x +7 => x + 7 * (-2) => -2 (x+7)
* = multiplié par
et
x * 7 => 7x - 11 => 7x - 11
et
x - 2 => x - 2 * (-3) => -3 (x - 2)