Q5 of 54 Page 135

If and if AX = C, then find the values of x and y.

x = 2, y = - 5

⇒ AX =


=


Comparing with


5x + 3y = -5 ---1


7x + 5y = -11 ---2


Multiply 1 by 5 and multiply 2 by 3 and subtract,



x = 2 and y = -5


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A fruit vendor sells fruits from his shop. Selling prices of Apple, Mango and Orange are ₹20, ₹10 and ₹5 each respectively. The sales in three days are given below


Write the matrix indicating the total amount collected on each day and hence find the total amount collected from selling of all three fruits combined.

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Find the values of x and y if .

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If then show that A2 = 4A + 5I2 = O.

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If then find AB and BA. Are they equal?