A teacher writes the following product on the board: (k^2-6)(k^2-5)= k^4-11k^2+30(k 2 −6)(k 2 −5)=k 4 −11k 2 +30


A teacher writes the following product on the board: (k^2-6)(k^2-5)= k^4-11k^2+30(k 2 −6)(k 2 −5)=k 4 −11k 2 +30


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