Lesson Example Discussion Quiz: Class Homework |
Example |
Title: Simplify the expression |
Grade: 9-a Lesson: S1-L1 |
Explanation: The best way to understand algebra is by looking at some examples. Take turns and read each example for easy understanding. |
Examples:
1. Simplify \$(4x^3)(3y^2)(2x^2y^(-2))\$.
Step 1a
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Rewrite the expression. |
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Explanation:
Rewrite the expression, \$(4x^3)(3y^2)(2x^2y^(-2))\$ as \$(4x^3)(3y^2)(2x^2)/y^2\$. |
Step 1b
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Evaluate the exponents. |
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Explanation:
Evaluate the exponents by using law of exponents
\$ 4(x^3)2(x^2)((3y^2)/y^2)\$ ⇒ \$4(2)(x^(3 + 2))(3y^(2-2))\$ ⇒ \$4(2)(x^(5))(3y^(0))\$ ⇒ \$4(2)(x^(5))(3(1))\$ ∵ \$a^0 = 1\$ |
Step 1c
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Perform multiplication among the terms. |
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Explanation:
Operate multiplication among the terms in the expression obtained afer evaluating the exponents. ⇒ \$4(2)(x^(5))(3(1))\$ ⇒ \$8(x^(5))3\$ ⇒ \$24(x^5)\$ ⇒ \$24x^5\$ ∴ \$(4x^3)(3y^2)(2x^2y^(-2)) = 24x^5\$. |
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