SaiBook.us Algebra

Home Course Section

Register Enroll

Step-4

Title: Find the modulus of the equations

Grade: 8-a Lesson: S2-L7

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

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Solve the equation \$ \| x + 1\| = 2 \$
2	Formula:	By using formula	\$\| x \| = a\$
3	Hint	By removing mod we get (+) (or) (-)	\$x = a (or) x = - a\$
4	Step	Here 'a' is '2'	\$x + 1 = 2 (or) x + 1 = - 2 \$
5	Step	Adding "- 1" on both sides we get	\$ x + \cancel1 - \cancel1 = 2 - 1 (or) x + \cancel1 - \cancel1 = - 2 - 1 \$
6	Step	After cancellation we get	\$x = 1 (or) x = - 3 \$
7		Answer	D

Step

Type

Explanation

Answer

Problem

Solve the equation
\$ | x + 1| = 2 \$

Formula:

By using formula

\$| x | = a\$

Hint

By removing mod we get (+) (or) (-)

\$x = a (or) x = - a\$

Step

Here 'a' is '2'

\$x + 1 = 2 (or) x + 1 = - 2 \$

Step

Adding "- 1" on both sides we get

\$ x + \cancel1 - \cancel1 = 2 - 1 (or) x + \cancel1 - \cancel1 = - 2 - 1 \$

Step

After cancellation we get

\$x = 1 (or) x = - 3 \$

Answer