secepatnyaa yaa .... tolong tulisin cara kerjanya foto dri kertas boleh
Jawab:
penyelesaian
y = x² + 4x + 7
y = -x² - 3x + 4 kurangkan
0 = 2x² +7x + 3
(2x + 1)(x + 3) = 0
x = - 1/2 atau x = - 3
y = x² + 4x + 7
x = - 1/2 ⇒ y = 1/4 - 2 + 7= 21/4
x = - 3 ⇒ y = 9 -12 + 7 = 4
x1. x2 - y1.y2 =
= (-1/2)(-3) - ( 21¹/₄)(4)
= 3/2 - 21
= -19 ¹/₂
[answer.2.content]
