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Step-5

Title: Substitute the varible value in square form of the expression

Grade: 8-a Lesson: S2-L2

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Determine the value of an expression when k = 4, l = 2, m = 3 \$ -k^2 - l^2 + m^2 \$
2	Step	Now substitute k,l,m values in expression	\$ -4^2 - 2^2 + 3^2 \$
3	Step	After simplification we get	\$ -16 - 4 + 9\$
4	Step	After adding we get	-11
5		Answer	A

Step

Type

Explanation

Answer

Problem

Determine the value of an expression when k = 4, l = 2, m = 3
\$ -k^2 - l^2 + m^2 \$

Step

Now substitute k,l,m values in expression

\$ -4^2 - 2^2 + 3^2 \$

Step

After simplification we get

\$ -16 - 4 + 9\$

Step

After adding we get

-11

Answer