Bonjour,
f(x)=9x²-(5x-3)²
=9x²-25x²+30x-9
=-16x²+30x-9
f(x)=(3-2x)(8x-3)
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Bonjour,
f(x)=9x²-(5x-3)²
=9x²-25x²+30x-9
=-16x²+30x-9
f(x)=(3-2x)(8x-3)