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Sagot :

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Bonjour,

H=(a+7)(a+2)

=a(a+7)+2(a+7)

=[tex]a^{2}[/tex]+7a+2a+14

=[tex]a^{2}[/tex]+9a+14

J=(5+23x-4)

=1+23x

L=(x-9)(5x+3)+4(2x-5)

=5x(x-9)+3(x-9)+8x-20

=5[tex]x^{2}[/tex]-45x+3x-27+8x-20

=5[tex]x^{2}[/tex]-34x-47

J’espère que ça va te servir.

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