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Popolare Word Problems >

The differenza of two numbers is 16 and the sum of their squares is 130. WHat are the two numbers?

Soluzione

T h e d i ff ere n ce o f tw o n u mb ers i s 16 an d t h e s u m o f t h e i r s q u a res i s 130. W H a t a re t h e tw o n u mb ers ?

Soluzione

The numbers : 9, - 7 or 7, - 9

Fasi della soluzione

Represent the numbers with

x and y

:

number 1 : x

number 2 : y

A.T.Q.:

x - y = 16

x^{2} + y^{2} = 130

Risolvi il sistema di equazioni:

x - y = 16, x^{2} + y^{2} = 130 : (x = 9, x = 7, y = - 7 y = - 9)

The numbers : 9, - 7 or 7, - 9

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