Basic 2D Matrix Operations

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Basic 2D Matrices Operations 

Find    (a)  M_1 + M_2    (b)    M_1  -  M_2     (c)  M_1.M_2        (d)    M_2.M_1

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New Questions

B2 = Random(-9, 9)
A2 = Random(-9, 9)
B3 = Random(-9, 9)
A3 = Random(-9, 9)
M_2: {{A2, B2}, {A3, B3}}
A7 = Random(-9, 9)
B7 = Random(-9, 9)
A8 = Random(-9, 9)
B8 = Random(-9, 9)
M_1: {{A7, B7}, {A8, B8}}
M_a: M_2 + M_1
M_s: M_1 - M_2
M_21: (M_2 * M_1)
M_12: (M_1 * M_2)
a: B2 ≟ Random[-9, 9]
b: B3 ≟ Random[-9, 9]
c: A7 ≟ Random[-9, 9]
d: A8 ≟ Random[-9, 9]
e: B7 ≟ Random[-9, 9]
f: B8 ≟ Random[-9, 9]
text2: "M_2=" + (LaTeX[M_2]) + ""
text1: "M_1=" + (LaTeX[M_1]) + ""
g: B7 ≟ Random[-9, 9]
text5: "(a)      " + (LaTeX[M_a]) + ""
text6: "(b)   " + (LaTeX[M_s]) + ""
text7: "(c)   " + (LaTeX[M_12]) + ""
text8: "(d)   " + (LaTeX[M_21]) + ""
j: false