Question

TOLONG JAWAB!!
Perhatikan gambar segitiga berikut!
Panjang sisi miring (hipotenusa) adalah...
A. 20 cm
B. 17 cm
C. 15 cm
D. 12 cm

beserta cara...​

Answer 1

(2x + 1)² = x² + (x + 7)²

4x² + 4x + 1 = x² + x² + 14x + 49

4x² + 4x + 1 = 2x² + 14x + 49

4x² - 2x² + 4x - 14x + 1 - 49 = 0

2x² - 10x - 48 = 0

x² - 5x - 24 = 0

(x - 8)(x + 3) = 0

x - 8 = 0

x = 8

x + 3 = 0

x = -3 (tidak memenuhi)

panjang hipotenusa

= 2x + 1

= 2(8) + 1

= 16 + 1

= 17 cm

Jawaban B