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nikkih1225
17.09.2019 •
Mathematics
Simplify the expression 2(x + 7)(x2 − 3x − 6). 2x3 − 28x2 − 18x − 84 2x3 − 18x2 − 28x − 84 2x3 + 8x2 − 54x − 84 2x3 + 4x2 − 27x − 42
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Ответ:
The answer is C, 2x^3 + 8x^2 - 54x - 84. (I took a test and got this correct)
Step-by-step explanation:
Distribute the 2 to the numbers in parenthesis.
The equation should now look like this.
(2x + 14)(x^2 - 3x - 6)
Multiply the right side by the left side, here are the results I got.
2x * x^2 = 2x^3
2x * -3x = -6x^2
2x * -6 = -12x
14 * x^2 = 14x^2
14 * -3x = -42x
14 * -6 = -84.
Now assemble the new equation.
2x^3 - 6x^2 + 14x^2 - 42x - 12x - 84
Now combine like terms.
2x^3 - 8x^2 - 54x - 84
Hope this helps you!
Ответ:
The correct option is C)
.
Step-by-step explanation:
Consider the provided expression.
Use the distributive property:
By using the above property we can simplify it as shown:
Use the distributive property.
Add and subtract the like terms.
Thus, the simplified form of the provided expression is
.
Hence, the correct option is C)
.
Ответ: