if 1 and –1 are zeroes of polynomial Lx4+Mx³+Nx²+Rx+p=0 show that L+N+P=M+R=0
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put x=1,then L1^4+M1^3+N1^2+R1+P=0 then, by solving we will get, L+M+N+R+P=0,by rearranging we get,L+N+P=M+R=0
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