andreanaqueen25 andreanaqueen25
  • 01-11-2019
  • Mathematics
contestada

The product of two numbers is 225 but their sun is -30 what are these two numbers

Respuesta :

aontrellmartin2 aontrellmartin2
  • 01-11-2019

Answer:

15

Step-by-step explanation:

Answer Link
nguyenminhnguyet82
nguyenminhnguyet82 nguyenminhnguyet82
  • 04-11-2019

Answer:

a = - 45

b = 15

Step-by-step explanation:

The 1st number is a, and the 2nd is b.

ab=225 (1)

a+b=-30 (2)

(2) <=> a = -30 - b

Replace a with -30 - b in (1):

(-30-b)b = 225

<=> -b^2 + 30b = 225

<=> b^2 - 30b + 225 = 0

<=> b^2 - 2.15.b + 15^2 = 0

<=> (b-15)^2 = 0

=> b = 15

a = -30 - b = - 30 - 15 = - 45

Answer Link

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