bonsoir,
C= 4-(7-x²)
= 4-7+x²
= -3+x² = x²-3
D= 4(x²-1)-(3x²-1)
= 4x² -4 -3x² +1
= x² -3
elles sont égales
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bonsoir,
C= 4-(7-x²)
= 4-7+x²
= -3+x² = x²-3
D= 4(x²-1)-(3x²-1)
= 4x² -4 -3x² +1
= x² -3
elles sont égales