No link plzz Find the value of a and b if (x-1)and(x+1) are the fctors of x^4-2x^3+3x^2-ax+b Share with your friends Share 0 Shruti Tyagi answered this Dear student, We have,f(x)=x4-2x3+3x2-ax+bSince x-1 and x+1 are factors of given equation so x=1 and x=1Put x=1 then f(x)=0f(1)=14-213+312-a1+b⇒1-2+3-a+b=0⇒2-a+b=0⇒-a+b=-2 --(1)Similarly, put x=-1 then f(x)=0f(-1)=-14-2-13+3-12-a-1+b⇒1+2+3+a+b=0⇒a+b=-6 --(2)From (1) and (2) we get,-a+b=-2 a+b=-6 2b=-8 ⇒b=-82 ⇒b=-4Put b=-4 in (1)-a-4=-2 ⇒-a=-2+4⇒-a=2⇒a=-2Thus, the values of a is -2 and b is -4 Regards 0 View Full Answer
