Question

Diketahui a² - b² = 40 dan a-b = 4 berapakah nilai a + b ??

Answer 1

A²-b² = 40 ⇒ (a-b)(a+b) = 40
a-b= 4
(a-b)(a+b) = 40
 4 (a+b) = 40
 a+b = 10

Answer 2

A² - b² = 40
(a-b)(a+b)=40
4(a+b)=40
a+b=40/4
a+b=10