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If A=[{:( 0,-x),(x,0):}].B[{:(0,1),(1,0)...

If `A=[{:( 0,-x),(x,0):}].B[{:(0,1),(1,0):}]` and `x^(2)=-1` , then show that `(A+B)^(2)=A^(2)+B^(2)`.

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CBSE COMPLEMENTARY MATERIAL-MATRICES AND DETERMINANTS-FOUR MARK QUESTIONS
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  16. Prove that : (i) |{:(a,c,a+c),(a+b,b,a),(b,b+c,c):}|=2 abc (ii) Pr...

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  17. |(b+c,c+a,a+b),(c+a,a+b,b+c),(a+b,b+c,c+a)|=2(3abc-a^(3)-b^(3)-c^(3))

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  18. Prove that | ((b+c)^2, a^2,a^2),(b^2,(c+a)^2,b^2),(c^2,c^2,(a+b)^2)|=2...

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