Question

(b) (m + n) - 3mn (m + n) when m = 3 and n = -2
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Answer 1

$(m + n) - 3mn (m + n) \\ when \: m \: = 3 \: and \: n \: = - 2$

So,

$= (m + n) - 3mn (m + n) \\ =( - 3 - 2) - 3( - 3)( - 2)( - 3 - 2) \\ = ( - 5) - 18( - 6) = - 5 + 108 = 103$

• hope it's helpful:)

$\small{|\underline{\mathtt{\red{i}\blue{t}\orange{z}\pink{P}\blue{a}\purple{h}\green{a}\red{d}\blue{h}\orange{i}}}}|$

Answer 2

Given:

• Equation: (m + n) - 3mn (m + n)
• Value of m = 3 and n = -2

To find:

• Value of the equation

Solution:

$\begin{gathered} : \implies \sf \color{skyblue}{(m + n) - 3mn(m + n)}\end{gathered}$

• Put the given Values

Where,

• m=3
• n=(-2)

$\begin{gathered} : \implies \color{skyblue}\sf{( - 2+ 3) - 3(3)( - 2)(3 - 2)}\end{gathered}$

$\begin{gathered} : \implies \color{skyblue}\sf{( - 2+ 3) - 3(3 \times - 2)(3 - 2)}\end{gathered}$

$\begin{gathered} : \implies \color{skyblue}\sf{( - 2+ 3) - 3( - 6)(3 - 2)}\end{gathered}$

$\begin{gathered} : \implies \color{skyblue}\sf{( - 2+ 3) 18(3 - 2)}\end{gathered}$

$\begin{gathered} : \implies \color{skyblue}\sf{( - 2+ 3) 54 - 36}\end{gathered}$

$\begin{gathered} : \implies \color{skyblue}\sf{(1)18}\end{gathered}$

$\begin{gathered} : \implies \underline{\boxed{\color{skyblue}{\frak{18}}}} \pink\bigstar \end{gathered}$

${\therefore \underline{ \sf \color {navy}{Hence, value \: of \: the \: equation \: is {\textbf{ \textsf{18}}}}}}.$

Thank you!!

@nupursharma