Question

Jika perbezaan dua nombor ialah 20 dan hasil darab dua nombor itu ialah 300. Berapakah pula jumlah dua nombor tersebut?

Answer 1

Sum of Two numbers = ± 40

Jumlah Dua angka = ± 40

Step-by-step explanation:

If the difference between the two numbers is 20 and the product of the two numbers is 300. What is the sum of the two numbers?

Let say numbers are

A  & A + 20

A ( A + 20) = 300

=> A² + 20A = 300

=> A² + 20A - 300 =-

=> A² + 30A - 10A -300 = 0

=> A(A + 30) - 10(A + 30) = 0

=> (A - 10) (A + 30) = 0

=> A = 10    & A = -30

A = 10

A + 20 = 30

Sum of two numbers = 10  + 30 = 40

A = -30

A + 20 = -10

Sum of Two numbers = -30 + (-10) = -40

Sum of Two numbers = ± 40