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Q35 of 124 Page 186

If and find (3A² – 2B + I).

Given : and

Matrices A and B are of order 2 2.

To find : (3A² – 2B + I).

Formula used :

Where c_ij = a_i1b_1j + a_i2b_2j + a_i3b_3j + ……………… + a_inb_nj

A² is a matrix of order 2 x 2.

A =

A² = =

A² = =

3A² = 3 × =

3A² =

2B = 2 × =

2B =

I =

3A² – 2B + I = + =

3A² – 2B + I =

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