BINARY OPERATIONS-1

If p*k = pk + p – 2k; find 4*2.

Solution

p*k = (pxk) + p – (2xk)   [rewriting the given expression more clearly]

4*2 = (4x2) + 4 – (2x2)   [substituting 4 for p and 2 for k]

4*2 = 8 + 4 – 4

4*2 = 12 – 4   [we add first before subtracting]

4*2 = 8.

Hence   4*2 = 8.

 TRY THIS........

If p*k = p + k – pk; find 6*2.