Question

Expand using suitable identity: (3a – 3b + c)2

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

$(a + b + c {)}^{2} = \\ {a}^{2} + {b}^{2} + {c}^{2} + 2ab + 2bc + 2ac$

here (3a-3b+c)²=

${3a}^{2} + ( - 3b {)}^{2} + {c}^{2} + 2 \times 3a \times (- 3b )+ 2 \times ( - 3b) \times c + 2 \times 3a \times c \\ 9 {a}^{2} + 9 {b}^{2} + {c}^{2} - 18ab - 6bc + 6ac$