SA3 marksYear: 2020MediumCBSE Class 10
polynomialsdivision-algorithm
Question
On dividing x3−3x2+x+2 by a polynomial g(x), the quotient and remainder were x−2 and −2x+4 respectively. Find g(x).
Solution
1
x3−3x2+x+2=(x−2)×g(x)+(−2x+4)
+0.5 marks2
⇒(x−2)×g(x)=x3−3x2+3x−2
+0.5 marks3
⇒g(x)=x−2x3−3x2+3x−2=(x−2)(x−2)(x2−x+1)
+1.5 marks