(3r-2k) +(3r+2k) who will be next brainliast ​

Question

(3r-2k) +(3r+2k)
who will be next brainliast ​

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Rose 7 days 2021-09-11T13:50:19+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-09-11T13:51:24+00:00

    Answer:

    6r is correct answer

    Step-by-step explanation:

    3r-2k+3r+2k

    3r+3r

    6r

    0
    2021-09-11T13:51:30+00:00

      {\boxed {\red{correct \: question}}}

    (3r - 2k {)}^{3}  + (3r + 2 {k)}^{3}

     \huge \underline {\boxed {\green{answer}}}

    (3r + 2k {)}^{3}  + (3r + 2k {)}^{3}

     = [(3r {)}^{3}  - {3  \times (3r {)}^{2}  \times (2k)} + {3 \times( 3r) \times (2k {)}^{2} } + {3 \times (3r) \times (2k {)}^{2} } +( 2k {)}^{3} ]

    {(a + b {)}^{3}  =  {a}^{3}  + 3 {a}^{2}b + 3a {b}^{2}  +  {b}^{3}  \:  \: and \:  \: (a - b {)}^{3}  =  {a}^{3}  - 3 {a}^{2} b + 3 a {b}^{2}  -  {b}^{3} }

    swipe left ⬆️⬆️

     = 27 {r}^{3}  - {3 \times 9 {r}^{2}  \times 2k} + {3 \times 3r \times 4 {k}^{2} } - 8 {k}^{3}  + 27 {r}^{3}  + {3 \times 9 {r}^{2}  \times 2k} + {3 \times 3r \times (4k {)}^{2} } + 8 {k}^{3}

     = 27 {r}^{3}  - 54 {r}^{2}k + 36r {k}^{2}  - 8 {k}^{3}  + 27 {r}^{3}  + 54 {r}^{2} k + 36r {k}^{2}  + 8 {k}^{3}

     = 27 {r}^{3}  - 54 {r}^{2} k + 36r {k}^{2}  - 8 {k}^{3}  + 27 {r}^{3}  + 54 {r}^{2} k + 36r {k}^{2}  + 8 {k}^{3}

     = 54 {r}^{3}  + 72r {k}^{2}

    HOPE IT’S HELPS YOU ❣️

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