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Hadassah Reeves
Mathematics
15 September, 00:55
Multiply (x - 4) (x2 + 6x - 5).
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Harry Potter
15 September, 01:19
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(x - 4) (x2 + 6x - 5)
First multiply the 1st term in the left factor by each in the right term:
x3 + 6x2 - 5x
Secondly, multiply the 2nd term in the left factor by each on the right, remembering to carry the (-) sign: - 4x2 - 24x + 20
Third, add all like terms:
x3 + 2x2 - 29x + 20
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Jay Dickson
15 September, 01:23
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(x⋅x2+x⋅6x+x⋅-5-4⋅x2-4⋅6x-4⋅-5) Multiply x by x2 to get x3. (x3+x⋅6x+x⋅-5-4⋅x2-4⋅6x-4⋅-5) Multiply x by 6x to get 6x2. (x3+6x2+x⋅-5-4⋅x2-4⋅6x-4⋅-5) Multiply x by - 5 to get - 5x. (x3+6x2-5x-4⋅x2-4⋅6x-4⋅-5) Multiply - 4 by x2 to get - 4x2. (x3+6x2-5x-4x2-4⋅6x-4⋅-5) Multiply - 4 by 6x to get - 24x. (x3+6x2-5x-4x2-24x-4⋅-5) Multiply - 4 by - 5 to get 20. (x3+6x2-5x-4x2-24x+20) Since 6x2 and - 4x2 are like terms, add - 4x2 to 6x2 to get 2x2. (x3+2x2-5x-24x+20) Since - 5x and - 24x are like terms, subtract 24x from - 5x to get - 29x. (x3+2x2-29x+20) (x3+2x2-29x+20) Remove the parentheses around the expression x3+2x2-29x+20.
MEH MEH!
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