Expand (2x − 1)(x + 4)
Worked out line by line the way a teacher would write it.
Answer
| Expanded form | 2x² + 7x − 4 |
Step-by-step solution
3 steps-
1 Given\left(2 x - 1\right) \left(x + 4\right)
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2 Multiply the binomials (FOIL: First, Outer, Inner, Last)
To multiply two binomials, multiply every term of one by every term of the other: the First terms, the Outer terms, the Inner terms and the Last terms, four products in all.
\left(2 x \cdot x + 2 x \cdot 4 + (-1) \cdot x + (-1) \cdot 4\right) -
3 Multiply out and combine like terms2 x^{2} + 7 x - 4
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