SaiBook.us Algebra

Home Course Section Lessons: L1 L2 L3 L4 L5 L6 L7 L8 L9 L10

Register Enroll

Step-3

Title: Evaluate the expression

Grade: 7-b Lesson: S3-L7

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

Lesson Steps

Steps	Problem	Solution
1	Evaluate the expression when \$x = -2\$	\$ −3x^2 − x + 7 \$
2	Substitute '\$x = -2\$' in expression	\$ -3(-2)^2 - (-2) + 7 \$
3	After Simipification	\$ -3(4)+2+7\$
4	After Multiplication	\$ -12+2+7 \$
5	After Subtraction	\$-12+14 \$ \$2\$
6	Answer	C = \$ 2 \$

Steps

Problem

Solution

Evaluate the expression when \$x = -2\$

\$ −3x^2 − x + 7 \$

Substitute '\$x = -2\$' in expression

\$ -3(-2)^2 - (-2) + 7 \$

After Simipification

\$ -3(4)+2+7\$

After Multiplication

\$ -12+2+7 \$

After Subtraction

\$-12+14 \$

\$2\$

Answer

C = \$ 2 \$