Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • Explain solution RD Sharma class 12 chapter Determinants exercise 5.1 question 2 subquestion (i) maths

Explain solution RD Sharma class 12 chapter Determinants exercise 5.1 question 2 subquestion (i) maths

Answers (1)

Answer:

D=5x^{2}+8x

Hint:

Determinant matrix must be square (i.e. same number of rows and columns)

Given:

\begin{vmatrix} x &-7 \\ x &5x+1 \end{vmatrix}

Solution:

\begin{aligned} &\mathrm{D}=\mathrm{a}_{11} \times \mathrm{C}_{11}+\mathrm{a}_{21} \times \mathrm{C}_{21} \\ &=\mathrm{x}(5 \mathrm{x}+1)+(-7 \mathrm{x}) \\ &=5 \mathrm{x}^{2}+\mathrm{x}+7 \mathrm{x} \\ &=5 \mathrm{x}^{2}+8 \mathrm{x} \end{aligned}

Posted by

Gurleen Kaur

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

PM Modi's Pariksha Pe Charcha 2025 to be held next month, registrations open till January 14
anam-khan

CBSE Board Exams 2025: Online portal for availing exemptions by CWSN students opens
anam-khan

Board Exams: States agree to equivalence; no question paper ‘jumbling’ from next year, says PARAKH CEO

Latest Question