mohayati2006
A=5X²-3X=X(5X-3) B=(X-1)²-2(X-1)=(X-1)(X-1-2)=(X-1)(X-3) C=(2X+1)(3X-4)+5(2X+1)=(2X+1)(3X-4+5)=(2X+1)(3X+1) Pour ex n42 A=(7X-1)²+(7X+1)²=49X²-14X²+1+49X²+14X+1=98X²+2=2(49X²+1) B=(5a-4)(a+2)-(a+2)²=(a+2)(5a-4-(a+2))=(a+2)(4a-6) B=4a²-6a+8a-12
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Verified answer
A = 49 x² - 14 x +1 + 49 x² + 14 x + 1a = 98 x² + 1
b = 5 a² + 10 a - 4 a - 8 - (a² + 4 a + 4)
b = 5 a² + 6 a - 8 - a² - 4a - 4
b = 4 a² + 2 a - 12
a = x ( 5 x - 3)
b = ( x -1) ( x -1 - 2 x + 2)
b = ( x -1) ( - x + 1)
c = ( 2 x +1) ( 3 x -4 + 5)
c = ( 2 x + 1) ( 3 x +1)
B=(X-1)²-2(X-1)=(X-1)(X-1-2)=(X-1)(X-3)
C=(2X+1)(3X-4)+5(2X+1)=(2X+1)(3X-4+5)=(2X+1)(3X+1)
Pour ex n42
A=(7X-1)²+(7X+1)²=49X²-14X²+1+49X²+14X+1=98X²+2=2(49X²+1)
B=(5a-4)(a+2)-(a+2)²=(a+2)(5a-4-(a+2))=(a+2)(4a-6)
B=4a²-6a+8a-12