Toán Tính m(x)-n(x) M(x)= 5x^3-2x^2+2x-5 N(x)= 5x^3+3x^2-6x+5 01/10/2021 By Vivian Tính m(x)-n(x) M(x)= 5x^3-2x^2+2x-5 N(x)= 5x^3+3x^2-6x+5
M(x) – N(x) = 5x³ – 2x² + 2x – 5 – (5x³ + 3x² – 6x + 5) = 5x³ – 2x² + 2x – 5 – 5x³ – 3x² + 6x – 5 = -5x² + 8x – 10 Vậy M(x) – N(x) = -5x² + 8x – 10 Trả lời
M(x) – N(x) = 5x³ – 2x² + 2x – 5 – (5x³ + 3x² – 6x + 5)
= 5x³ – 2x² + 2x – 5 – 5x³ – 3x² + 6x – 5
= -5x² + 8x – 10
Vậy M(x) – N(x) = -5x² + 8x – 10