Question

simplify the following and varify the result when x=1,y=2 and z=3​

Answer 1

Answer:

(iii) -691.2 (V) 6917

Step-by-step explanation:

(iii) x =1, y =2, z=3

     (-7xy^2) x (-3/7x^2z) x ( -2/5x^2z) x ( 4/9y^2z^2)

     ( -7*1*4) x( -3/7*1*3) x ( -2/5*1*3) x ( 4/9*4*9)

     -28 x (-9/7) x (-6/5) x 16

     -4 x -9 x  (-6/5) x 16

      -3456/5

      -691.2

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(v)  (4/7xyz) x ( -2/3x^2yz) x (-42xy^2z)

     (4/7*1*2*3) x ( -2/3*1*2*3) x ( -42*1*4*3)

      24/7 x -4 x -504

       48384/7

        6917