a + b = 6ab = 4a² + b²
( a + b )² = a² + 2ab + b²6² = a² + b² + 2.436 = a² + b² + 824 = a² + b²
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a + b = 6
ab = 4
a² + b²
( a + b )² = a² + 2ab + b²
6² = a² + b² + 2.4
36 = a² + b² + 8
24 = a² + b²
maka:
a + b = 6
ab = 4
yg ditanya a² + b² = (a + b)² - 2ab
= 6² - 2(4)
= 36 - 8
= 28