Question

what is the product of 5xy,2yz and 4zx?
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Answer 1

Q) 5xy * 2yz * 4zx

A) multiply constants and variables separately

   = (5 * 2 * 4) (x * y * y * z * z * x)

   = 40 x^2 y^2 z^2

   = 40 (xyz)^2

Therefore, the product will be 40 (xyz)^2 .