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Yuliya22 [10]
3 years ago
11

Need help on this question

Mathematics
1 answer:
Soloha48 [4]3 years ago
7 0

Answer:

Both equal 4

Step-by-step explanation:

(a-b)^2

(7-9)^2

(-2)^2

4

a^2-2ab+b^2

7^2-2(7)(9)+9^2

49-126+81

4

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Answer:  3t²(2st⁷ - s⁶ - 2t⁵)

<u>Step-by-step explanation:</u>

5s⁶t² + 6st⁹ - 8s⁶t² - 6t⁷     <em>5s⁶t² and - 8s⁶t² are like terms which = -3s⁶t² when combined</em>

=          6st⁹ - 3s⁶t² - 6t⁷      <em>next, factor out the GCF of 3t²</em>

=      3t²(2st⁷ - s⁶ - 2t⁵)

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