Let R, a = i +2 j -3 k , b = i - j +2 k If (( a + b ) ( a b )) ( a - b )=8 i -40 j -24 k then | .( a + b ) (...

Question

Let R, a = i +2 j -3 k , b = i - j +2 k If (( a + b ) ( a b )) ( a - b )=8 i -40 j -24 k then | .( a + b ) ( a - b )|^2 is equal to

Accepted Answer

(C)

JEE Main 2023 Mathematics question