jika a+b = 9 dan ab = 7 maka nilai ¼(a²-5ab+b²) adalah
Jawaban:
Penjelasan:
a + b = 9
ab = 7
¼(a²-5ab+b²) = ¼(a² + b² - 5ab)
= ¼ ((a + b)² - 2ab - 5b)
= ¼ ((a + b)² - 7ab)
= ¼ (9² - 7(7))
= ¼ (81 - 49)
= ¼ (32)
= 8
[answer.2.content]10 Largest Cities in the USA (Top 10)
10 Largest Cities in the USA (Top 10)
Jawaban:
Penjelasan:
a + b = 9
ab = 7
¼(a²-5ab+b²) = ¼(a² + b² - 5ab)
= ¼ ((a + b)² - 2ab - 5b)
= ¼ ((a + b)² - 7ab)
= ¼ (9² - 7(7))
= ¼ (81 - 49)
= ¼ (32)
= 8
[answer.2.content]