bonjour
développer
F=(2x-5)(2x+1)=
4x²+2x-10x-5=
4x²-8x-5
B=4(x-1)²-9=
4(x²-2x+1)-9=
4x²-8x+4-9=
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bonjour
développer
F=(2x-5)(2x+1)=
4x²+2x-10x-5=
4x²-8x-5
B=4(x-1)²-9=
4(x²-2x+1)-9=
4x²-8x+4-9=
4x²-8x-5