# If <span lang="EN

Given :

To find : x

Formula used :

Where cij = ai1b1j + ai2b2j + ai3b3j + ……………… + ainbnj

If A is a matrix of order a b and B is a matrix of order c d ,then matrix AB exists and is of order a d ,if and only if b = c

= 0

=

=

=

= = = 0

2x2 + 6x + 4 = 0

x2 + 3x + 2 = 0

(x + 1)(x + 2) = 0

x + 1 = 0 or x + 2 = 0

x = -1 or x = -2

x = -1 or x = -2

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