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13 December, 04:36

Expand and simlify: a) - 2{3a-4{a - (2+a) ]} b) 5{3c-[d-2 (c+d) ]}

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  1. 13 December, 04:57
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    a) - 2 [ 3a-4 (a-2-a) ]

    = - 2[ 3a - 4 * (-2) ]

    = - 2 (3a + 8)

    = - 6a-16

    b) 5 [ 3c - (d-2c-2d) ]

    = 5 [ 3c - (-d - 2c) ]

    = 5 (3c + d + 2c)

    = 5 (5c + d)

    = 25c + 5d
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