bantu banh............
Jawab:
d bwh y
Penjelasan dengan langkah-langkah:
2x² + 5x - 6 = 0
a = 2, b = 5, c = -6
p + q = -b/a = -5/2
pq = c/a = -6/2 = -3
c. p² + q² = ( p + q )² - 2pq
= ( -5/2 )² - 2 ( -3 )
= 25/4 + 6
= 49/4
d. 1/p + 1/q = p + q / pq
= -5/2 / -3
= -5/2. -⅓
= -⅚
e. D = b² - 4ac
= 5² - 4.2 ( -6 )
= 25 + 48
= 73
p - q =
- \frac{ \sqrt{d} }{a} = - \frac{ \sqrt{73} }{2}
( p - q )² =
( - \frac{ \sqrt{73} }{2} ) {}^{2} = \frac{73}{4} = 18 \frac{1}{4}
[answer.2.content]
