Question

expand
(a-2b+c)^2
can u find the ans​

Answer 1

Ꭺͷswϵr :-

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$\green{ \mathfrak{ \longrightarrow{ \: {(a - 2b + c)}^{2} }}}$

We know that,

➜ (a - b + c)² = a² + b² + c² - 2(ab + bc - ca)

So,

➜ (a)² + (-2b)² + (c)² - 2(a×2b + 2b×c - c×a)

➜ a² + 4b² + c² - 2(2ab + 2bc - ca) ...(ans)

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SOME FORMULAS :-

➜ (a + b + c)² = a² + b² + c² + 2(ab + bc + ca)

➜ (a + b - c)² = a² + b² + c² + 2(ab - bc - ca)

➜ (a - b + c)² = a² + b² + c² - 2(ab + bc - ca)

➜ (a - b - c)² = a² + b² + c² - 2(ab - bc + ca)

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