43 [Mod.8 - Cal.4]
Développer et réduire chaque expression.
1. A = (2x + 2)(8x+16)
2. B = (x − 10)(3x+7)
3. C = (5x-8)(4x-11)
4. D = (-3x+6)(x−13)
Développer et réduire chaque expression.
1. A = (2x + 2)(8x+16)
2. B = (x − 10)(3x+7)
3. C = (5x-8)(4x-11)
4. D = (-3x+6)(x−13)
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bonsoir;
1. A = (2x + 2)(8x+16)
= 16x² +32x +16x +32
= 16x² +48x +32
2. B = (x − 10)(3x+7)
= 3x² +7x -30x -70
= 3x² -23x -70
3. C = (5x-8)(4x-11)
= 20x² -55x -32x +88
= 20x² -87x +88
4. D = (-3x+6)(x−13)
= -3x² +39x +6x -78
=-3x² +45x -78