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hacklachooknhe
2 năm trước
Cho 2 đa thức $P(x)=x^2+2x-5$ và $Q(x)=x^2-9x+5$ a.Tính $M(x)=P(x)+Q(x) ; N(x)=P(x)-Q(x)$ b.Tìm nghiệm của đa thức $M(x) ; N(x)$ c. Không đặt phép tính tìm đa thức: $Q(x)-P(x)$
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