Concept-wise Practice

z identity MCQ Questions for Class 9

z identity se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

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Practice Questions

1 questions tagged with z identity.

Explanation opens after your attempt

Correct Answer

D. \(z^2-81\)

Step 1

( (z+9)(z-9)=z^-2-81 ). Exam tip: keep \(9^2=81\) in mind.

Step 2

The correct answer is D. \(z^2-81\). ( (z+9)(z-9)=z^-2-81 ). Exam tip: keep \(9^2=81\) in mind.

Step 3

( (z+9)(z-9)=z^-2-81 ) है। परीक्षा में \(9^2=81\) रखें।