Math

QuestionFind expressions equivalent to (2z3)(9z+5)(-2 z-3)-(9 z+5). Options: 2z3+9z5-2 z-3+-9 z-5, 5+11z3-5+-11 z-3, 11z8-11 z-8, (3z2)(5z+9)(-3 z-2)-(5 z+9).

Studdy Solution

STEP 1

Assumptions1. We are given four expressions and we need to determine which of them are equivalent to (z3)(9z+5)(- z-3)-(9 z+5).

STEP 2

First, we need to simplify the given expression (2z)(9z+5)(-2 z-)-(9 z+5). To do this, we distribute the negative sign to the terms inside the second parentheses.
(2z)(9z+5)=2z9z5(-2 z-)-(9 z+5) = -2 z - -9 z -5

STEP 3

Next, we combine like terms.
2z39z5=11z8-2 z -3 -9 z -5 = -11 z -8

STEP 4

Now, we compare the simplified expression 11z8-11 z -8 with each of the given expressions to see which ones are equivalent.

STEP 5

First, compare with 2z3+9z5-2 z-3+-9 z-5. This expression is equivalent to the given expression as it is the same as the expression we obtained after distributing the negative sign in2.

STEP 6

Next, compare with 5+11z3-5+-11 z-3. Rearrange the terms to get 11z8-11 z -8. This expression is equivalent to the given expression.

STEP 7

Next, compare with 11z-11 z-. This expression is equivalent to the given expression.

STEP 8

Finally, compare with (3z2)(5z+)(-3 z-2)-(5 z+). Distribute the negative sign to the terms inside the second parentheses to get 3z25z=8z11-3 z -2 -5 z - = -8 z -11. This expression is not equivalent to the given expression.
The expressions equivalent to (2z3)(z+5)(-2 z-3)-( z+5) are 2z3+z5-2 z-3+- z-5, 5+11z3-5+-11 z-3, and 11z8-11 z-8.

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