1.

(iii) (p^2 - q^2r)^2+ 2p^2q^2r​

Answer»

p⁴+q^4r² Step-by-step EXPLANATION: (p²- q^2r)²+ 2p²q^2r = p⁴+q^4r²-2p²q^2r + 2p²q^2r = p⁴+q^4r²



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