Question

for what value of x , the square matrix of [ 2x+4 4
x+5 3] is a singular matrix​

Answer 1

Answer:

x=4

Step-by-step explanation:

[12 4

9 3]=(12×3)-(9×4)=0 is a singular matrix

Answer 2

Answer:

x=4

Step-by-step explanation:

$\left[\begin{array}{ccc}2x+4&4\\x+5&3\7\end{array}\right]$

on solving,

(2x+4)3 -4(x+5)=0

⇒6x+12-4x-20=0

⇒2x=8

∴x=4

#SPJ2