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Answers

3x³+7y-4z=(3x²+2z)shsbsd

use foil method (first, outer, inner, last) for multiplying

first: x times x = x²

outer: x times -1 = -x

inner: -7 times x = -7x

last: -7 times -1 = +7


put altogether:

x² - x - 7x + 7

add/subtract like terms

= x² - 8x + 7


answer: x² - 8x + 7
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