Question

A²-b²= 40 dan a-b= 4. Berapakah nilai a+b?

Answer 1

Misalkan a² - b² = 40, a - b = 4, maka:

a² - b² = 40
a - b = 4

a = 7
b = 3

Pembuktian:
a² - b² = 7² - 3²
= 49 - 9
= 40
a - b = 7 - 3
= 4

Maka a + b = 7 + 3 = 10

(Maaf kalau salah dan semoga membantu)