Evaluate the expression a -3bc if a = -5 b= -4 c = 10

Rubinsh asked Jan 12, 2023

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Rubinsh asked Jan 12, 2023

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23 votes

Solution:

The algebraic expression given is;

$\begin{gathered} a^2-3bc \\ \text{where;} \\ a=-5 \\ b=-4 \\ c=10 \end{gathered}$

Substituting these values into the expression;

$\begin{gathered} a^2-3bc=(-5)^2-3(-4)(10) \\ =25-3(-40) \\ =25+120 \\ =145 \end{gathered}$

Therefore, the value is 145.

Pmk answered Jan 18, 2023

by Pmk

3.2k points

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