Bonjour,
[tex]A=(x+7)(x+2)\\A=x^2+2x+7x+14\\A=x^2+9x+14[/tex]
[tex]B=(2x+3)(x-4)\\B=2x^2-8x+3x-12\\B=2x^2-5x-12[/tex]
[tex]C=(t-5)(t-3)\\C=t^2-3t-5t+15\\C=t^2-8t+15[/tex]
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Bonjour,
[tex]A=(x+7)(x+2)\\A=x^2+2x+7x+14\\A=x^2+9x+14[/tex]
[tex]B=(2x+3)(x-4)\\B=2x^2-8x+3x-12\\B=2x^2-5x-12[/tex]
[tex]C=(t-5)(t-3)\\C=t^2-3t-5t+15\\C=t^2-8t+15[/tex]