Question

please answer my question with solution

Answer 1

$\underline{\Large\mathbf{Question}}$

$6 {a}^{2} c - 4 {b}^{2} c - 3 {c}^{2} a - bc - {c}^{2} - 2 {b}^{2} c - {a}^{2} c$

$\underline{\underline{\huge\mathfrak{Solution}}}$

→ $\bf Writing \: the \: like \: terms \: together$

$6 {a}^{2} c - 1{a}^{2} c - 4 {b}^{2} c - 2 {b}^{2} c - 3 {c}^{2} a - 1 {c}^{2} - 1bc \\ \\ \bf = 5 {a}^{2} c - 6 {b}^{2} c - 3 {c}^{2} a - {c}^{2} - bc$

We have given that :
a = 1
b = 2
and c = 1

$\bf Putting \: the \: given \: values :$

$5 {(1)}^{2} (1) - 6 {(2)}^{2} (1) - 3 {(1)}^{2} (1) \\ \: \: \: \: \: \: \: \: \: \: \: - {(1)}^{2} - (2)(1) \\ \\ = 5 - 6(4) - 3 - 1 - 2 \\ \\ = 5 - 24 - 6 \\ \\ = 5 - 30 \\ \\ \bf = - 25$