Lesson Example Discussion Quiz: Class Homework |
Step-1 |
Title: Square roots and cube roots |
Grade: 8-a Lesson: S1-L5 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
Step | Type | Explanation | Answer |
---|---|---|---|
1 |
Problem |
Solve for x in the equation: \$ "x" + \sqrt "x" \$ = 6 |
|
2 |
Step |
Isolate the square root term: |
\$\sqrt "x" = 6 - "x"\$ |
3 |
Step |
Square both sides to eliminate the square root: |
\$(\sqrt "x")^2= (6 - "x")^2\$ |
4 |
Step |
Expand the right side: |
\$ "x" = 36 - 12"x" + "x"^2\$ |
5 |
Step |
Rearrange terms to set the equation to zero: |
\$"x"^2 - 13"x" + 36 = 0\$ |
6 |
Step |
Factor the quadratic equation: |
(x - 4)(x - 9) = 0 |
7 |
Step |
Find the solutions from the factors: |
x = 4 and x = 9 |
8 |
Step |
Check the solutions by substituting them back into the original equation.For x = 4 |
\$\sqrt4 + 4 = 2 + 4 = 6\$ |
9 |
Step |
Check the solutions by substituting them back into the original equation.For x = 9 |
\$\sqrt9 + 9 = 3 + 9 = 12\$ |
10 |
Step |
So, the only solution to the equation is x = 4. |
|
11 |
Choice.A |
This option suggests that the solution to the equation \$\sqrt"x" + "x" = 6\$ is x = 12. However, when we substitute x = 12 into the original equation, we get \$\sqrt12 + 12\$, which doesn’t equal 6. Therefore, option A is incorrect |
12 |
12 |
Choice.B |
This option suggests that the solution to the equation \$\sqrt "x" + "x" = 6\$ is x = 8. However, when we substitute x = 8 into the original equation, we get \$\sqrt8 + 8\$, which doesn’t equal 6. Therefore, option B is incorrect |
8 |
13 |
Choice.C |
This option suggests that the solution to the equation \$\sqrt "x" + "x" = 6\$ is x = 6. However, when we substitute x = 6 into the original equation, we get \$\sqrt 6 + 6\$, which doesn’t equal 6. Therefore, option C is incorrect |
6 |
14 |
Choice.D |
This option suggests that the solution to the equation \$\sqrt "x" + "x" = 6\$ is x = 4. When we substitute x = 4 into the original equation, we get \$\sqrt 4 + 4\$, which does indeed equal 6. Therefore, option D is correct solution |
4 |
15 |
Answer |
Option |
D |
16 |
Sumup |
Can you summarize what you’ve understood in the above steps? |
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