Multiplying Binomials: Expanding (2x-9)(3x+4)
This article will guide you through the process of multiplying the binomials (2x-9) and (3x+4), resulting in a trinomial.
Understanding the Process
The multiplication of binomials is a fundamental concept in algebra. It involves applying the distributive property twice. The distributive property states that multiplying a sum by a number is the same as multiplying each term of the sum by that number.
Expanding the Binomials
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Multiply the first terms: (2x) * (3x) = 6x²
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Multiply the outer terms: (2x) * (4) = 8x
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Multiply the inner terms: (-9) * (3x) = -27x
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Multiply the last terms: (-9) * (4) = -36
Combining Like Terms
Now we combine the terms we obtained:
6x² + 8x - 27x - 36
Finally, simplify the expression by combining the x terms:
6x² - 19x - 36
The Result
The product of (2x-9) and (3x+4) is the trinomial 6x² - 19x - 36.
Application and Importance
The ability to multiply binomials is essential in various algebraic operations, including:
- Solving quadratic equations
- Factoring trinomials
- Graphing quadratic functions
Understanding this concept is a crucial building block for mastering higher-level algebra.