Expand the expression to a polynomial in standard form:left bracket, minus, 3, x, minus, 1, right bracket, left bracket, 2, x, squared, plus, 8, x, plus, 1, right bracket(−3x−1)(2x 2 +8x+1)
Question
Expand the expression to a polynomial in standard form:left bracket, minus, 3, x, minus, 1, right bracket, left bracket, 2, x, squared, plus, 8, x, plus, 1, right bracket(−3x−1)(2x 2 +8x+1)
Solution
To expand the expression to a polynomial in standard form, you need to distribute each term in the first bracket to each term in the second bracket.
First, distribute -3x to each term in the second bracket:
-3x * 2x^2 = -6x^3 -3x * 8x = -24x^2 -3x * 1 = -3x
Then, distribute -1 to each term in the second bracket:
-1 * 2x^2 = -2x^2 -1 * 8x = -8x -1 * 1 = -1
Now, add all these terms together:
-6x^3 - 24x^2 - 3x - 2x^2 - 8x - 1
Combine like terms:
-6x^3 - (24x^2 + 2x^2) - (3x + 8x) - 1
This simplifies to:
-6x^3 - 26x^2 - 11x - 1
So, the expression (−3x−1)(2x^2 +8x+1) expands to -6x^3 - 26x^2 - 11x - 1 in standard form.
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