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Question

7x×(5yz)×2xz = ___


  1. 70xyz

  2. 15x2z24yz

  3. 70xyz

  4. 70x2yz2


Solution

The correct option is D

70x2yz2


 When we multiply monomials, we first multiply the coefficients and then multiply the variables by adding the exponents. This will always give a monomial.

On multiplying x with x, its power is raised to 2; on multiplying z with z its power is also raised to 2. Also, multiplying all the coefficients, we get 70.

Therefore the answer is 70x2yz2.

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