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If a=x−3,b=3x and x=2,find the value of 4ab

Answer :

[tex]\begin{gathered} a=x-3 \\ b=3x \\ x=2 \end{gathered}[/tex]

Substitute in the given expression (4ab) the variables (a and b) by its given values:

[tex]4ab=4(x-3)(3x)[/tex]

Substitute in the expresion above the x by 2 and evaluate:

[tex]\begin{gathered} 4(2-3)(3*2) \\ =4(-1)(6) \\ =-24 \end{gathered}[/tex]Then, the value of 4ab is -24

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