7. Find the cube-roots of : (i) 700 x 2 x 49 x 5 (ii) -216 x 1728 (iii) -64 x -125 (iv) -27/343 (v)729/-1331 (

Question

7. Find the cube-roots of :
(i) 700 x 2 x 49 x 5
(ii) -216 x 1728
(iii) -64 x -125
(iv) -27/343
(v)729/-1331
(vi) 250.047
(vii) -175616​

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Clara 3 weeks 2021-09-09T16:49:04+00:00 1 Answer 0 views 0

Answers ( )

    0
    2021-09-09T16:50:28+00:00

    Step-by-step explanation:

    i) 700×2×49×5

    = (2×2×5×5×7)×2×(7×7)×5

    = 2×2×2×5×5×5×7×7×7

    = (2×5×7)³

    = (70)³

    ii) (-216)×1728

    = (-6)³×(12)³

    = (-72)³

    iii) (-64)×(-125)

    = (-4)³×(-5)³

    = (20)³

    iv) -27/343

    = (-3)³×(7)³

    = (-21)³

    v) 729/(-1331)

    = (9)³/(-11)³

    = (-9/11)³

    vi) 250.047

    = (250047/1000)

    = (63/10)³

    =(6.3)³

    vii) -175616

    = (-56)³

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