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Sagot :

A(x)= x²+1 
B(x)=4x²-4 (celle là pas sur)
C(x)=4x²-1
D(x)=4x²+16x-x-4 voilà ! :) j'espere t'avoir aidée =)
1. a. 1x²
b. 3x²
c. 4x²
d. 4x²

2. a. A(x) = B (x)
x(x+1)= 2x + (x-2)²
x²+x = 2x + x² - 4x + 2
x² + x = x² - 2x + 2 
x = -2x +2 
3x = 2
x= 2/3

c. C(x) = D (x)
(2x - 1)² = (4x - 1)(x + 4)
4x² - 4x - 2 = 4x² + 16x - x - 4
4x² - 4x - 2 = 4 x² + 15x - 4
-4x - 2 = 15x - 4
4 = 19x
19x = 4
x= 4/19

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