Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • If <img alt="\begin{bmatrix} x+y &7 \\ 9& x-y \end{bmatrix} = \begin{bmatrix} 2 &7 \\ 9& 4 \end{bmatrix}" src="https://learn.careers360.com/latex-image/?%5Cbegin%7Bbmatrix%7D%20x&plus;y%20%267%20%5C%5C%209%26%20x-y%20%5Cend%7Bbmatri

If \begin{bmatrix} x+y &7 \\ 9& x-y \end{bmatrix} = \begin{bmatrix} 2 &7 \\ 9& 4 \end{bmatrix} , then x . y= ________

 

 

Answers (1)

\begin{bmatrix} x+y &7 \\ 9& x-y \end{bmatrix} = \begin{bmatrix} 2 &7 \\ 9& 4 \end{bmatrix}

x+y = 2....(i)

x - y = 4....(ii)

Equation (i) + Equation (ii)

2x = 6  => x = 3 

y = -1 

x.y = -3

Posted by

Safeer PP

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

CBSE practical exams 2026 will be cancelled over non-compliance with guidelines, says board

Latest Question