Tolong di jawab ya kak:)

Materi : Bentuk Aljabar
= ( 7 - 3y - y² ) - ( 2y² + 1 )
= 7 - 3y - y² - 2y² - 1
= 6 - 3y - 3y²
= { 3( 2 - y - y² ) } { a. }
Semoga bisa membantu
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