Toán Lớp 8: Thương của phép chia: (2x^4 – 13x ³ + 15x ² + 11x – 3) : (x ² – 4x – 3) là:
A. 2x ² – 5x
B. 2x ² + 5x – 1
C. 2x ² – 5x – 1
D. 2x – 5x + 1
nhanh nhé
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Toán Lớp 8: Thương của phép chia: (2x^4 – 13x ³ + 15x ² + 11x – 3) : (x ² – 4x – 3) là:
A. 2x ² – 5x
B. 2x ² + 5x – 1
C. 2x ² – 5x – 1
D. 2x – 5x + 1
nhanh nhé
²
Comments ( 2 )
=(2x^4-8x^3-6x^2-5x^3+20x^2+15x+x ^2 – 4x – 3) / (x ^2 – 4x – 3)
=(2x^2(x ^2 – 4x – 3)-5x(x ^2 – 4x – 3)+x ^2 – 4x – 3) / (x ^2 – 4x – 3)
=((x ^2 – 4x – 3)(2x^2-5x+1)) / (x ^2 – 4x – 3)
=2x^2-5x+1