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Name: Explain solution RD Sharma class 12 chapter Determinants exercise 5.1 question 2 subquestion (i) maths
Uploaded: Wed, 2021-08-04 20:28
Description: Explain solution RD Sharma class 12 chapter Determinants exercise 5.1 question 2 subquestion (i) maths

#Determinants
#School
#R.D. Sharma
#Maths
#CBSE 12 Class
#RD Sharma Vol. 1 Class 12

#1.3
#5.2
#5.3
#5.4
#5.5
#5.1
#9.12
#Fill in the blanks
#Very Short Answer type
#Multiple Choice Questions (MCQs)

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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

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

Answers (1)

Posted by

Gurleen Kaur

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