Qui peut me dire si c'est bon
P(x)= (3x10)²-169
1) développer et réduire P(x)
réponse: P(x)=(3x+10)²-169
P(x)=(3x+10)(3x+10)-169
P(x)= 9x²+30x+30x+100-169
P(x)= 9x²+60x-69

2) factoriser P(x)
P(x)=(3x+10)²-169
P(x)=(3x+10)²-(13)²
P(x)=(3x+10+13)(3x+10-13)
P(x)=(3x+23)(3x-3)

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