Lesson Example Discussion Quiz: Class Homework |
Step-1 |
Title: Non-linear equations in one variable |
Grade: 1300-a Lesson: S1-L6 |
Explanation: Hello Students, time to practice and review the steps for the problem. |
Lesson Steps
Step | Type | Explanation | Answer |
---|---|---|---|
1 |
Problem |
Solve the nonlinear equation \$ 3x^2 - 8x + 5 = 0\$. |
|
2 |
Formula: |
The quadratic formula provides the solutions for x in equations of the form \$ax^2 + bx + c = 0\$ |
\$ x = (-b ± \sqrt(b^2 - 4ac)) / (2a) \$ |
3 |
Step |
Analyze the equation \$3x^2 - 8x + 5 = 0\$, then plug its values to the given formula |
a = 3, b = - 8, and c = 5 \$ x = (-(-8) ± \sqrt((-8)^2 - 4 times 3 times 5)) / (2 times 3) \$ \$ x = (8 ± \sqrt(64 - 60)) / 6 \$ |
4 |
Step |
Make it simplified and here, we have two possible solution are |
\$ x = (8 ± \sqrt4) / 6 \$ \$ x = (8 ± 2) / 6 \$ \$ x = (8 + 2) / 6 \$ and \$ x = (8 - 2) / 6 \$ |
5 |
Step |
After simplification |
\$ x = \cancel(10)^5 / \cancel6^3 \$ and \$ x = \cancel6^1/\cancel6^1 \$ \$ x = 5/3 \$ and \$ x = 1 \$ |
6 |
Step |
Therefore, the solutions to the non-linear equation \$ 3x^2 - 8x + 5 = 0\$ are \$ x = 5/3 and x = 1 \$. |
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7 |
Choice.A |
Option A states that \$x = 2/3\$ and x = − 3, which are not the correct roots of the equation |
\$ x = 2/3 and x = - 3 \$ |
8 |
Choice.B |
Option B is flawed as it wrongly considers \$x = - 1/2\$ as a solution, inconsistent with actual solutions |
\$ x = - 1/2 and x = 1 \$ |
9 |
Choice.C |
Option C is correct because it correctly states the solutions as \$x = 5/3\$ and x = 1 |
\$ x = 5/3 and x = 1 \$ |
10 |
Choice.D |
Option D is wrong; the roots, x = 7 and x = 4, don’t satisfy the equation. Hence, incorrect |
\$ x = 7 and x = 4 \$ |
11 |
Answer |
Option |
C |
12 |
Sumup |
Can you summarize what you’ve understood in the above steps? |
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