Find , if for a unit vector…

MATHEMATICS · Subjective · CBSE · Mathematics · Vector Algebra · Vector Algebra

Problem

9. Find ∣x⃗∣|\vec{x}|, if for a unit vector a⃗,(x⃗−a⃗)⋅(x⃗+a⃗)=12\vec{a},(\vec{x}-\vec{a}) \cdot(\vec{x}+\vec{a})=12.

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