Question

expand (a-3b+4c)^2............plz tell me​

Answer 1

ANSWER✔

$\dashrightarrow (a-3b+4c)^2$

$\implies (a)(a)+(a)(-3b)+(a)(4c)+(-3b)(a)+(-3b)(-3b)+(-3b)(4c)+(4c)(a)+(4c)(-3b)+(4c)(4c)$

$\implies a^2-3ab+4ac-3ab+9b^2-12bc+4ac-12bc+16c^2$

$\implies a^2-3ab+4ac-3ab+9b^2-12bc+4ac-12bc+16c^2$

$\implies a^2-6ab+8ac+9b^2-24bc+16c^2$

$\large{\boxed{\bf{ \star\:\: a^2-6ab+8ac+9b^2-24bc+16c^2\:\: \star}}}$

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