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Verified answer
Pemfaktoran..(dengan cara distributif empat suku)
a. k² - 2/5 k + 1/25 = k² - 1/5 k - 1/5 k + 1/25
= (k² - 1/5 k) + (-1/5 k + 1/25)
= k(k - 1/5) - 1/5 ( k - 1/5)
= (k - 1/5)(k - 1/5)
= (k - 1/5)²
b. 36y² + 6y + 1/4 = 36 y² + 3y + 3y + 1/4
= 6y(6y + 1/2) + 1/2 (6y + 1/2)
= (6y + 1/2)(6y +1/2)
= (6y +1/2)²