Câu 1 :
a ) x ² ( x – 2x ³ )
b ) ( x ² + 1 ) ( 5 – x )
c ) ( x – 2 ) ( x ² + 3x – 4 )
Câu 1 : a ) x ² ( x – 2x ³ ) b ) ( x ² + 1 ) ( 5 – x ) c ) ( x – 2 ) ( x ² + 3x – 4 )
By Madelyn
By Madelyn
Câu 1 :
a ) x ² ( x – 2x ³ )
b ) ( x ² + 1 ) ( 5 – x )
c ) ( x – 2 ) ( x ² + 3x – 4 )
a,x^2(x-2x^3)
=x^3-2X^5
b,(x^2+1)(5-x)
=5x^2+5-x^3-x
c,(x-2)(x^2+3x-4)
=x^3+3x^2-4x-2x^2-6x+8
=x^3+x^2-10x+8
a ) x ² ( x – 2x ³ ) = x³ – 2x∧5
b ) ( x ² + 1 ) ( 5 – x ) = 5x² – x³ + 5 – x
c ) ( x – 2 ) ( x ² + 3x – 4 ) = x³ + 3x² – 4x – 2x² + 6x – 8