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受欢迎的 Word Problems >

The product of 2 numbers is 4.2. What are the 2 numbers if their sum is 4.2.

解答

T h e p ro d u c t o f 2 n u mb ers i s 4.2. Wha t a re t h e 2 n u mb ers i f t h e i r s u m i s 4.2.

解答

The numbers : 1.64174 \dots, 2.55825 \dots or 2.55825 \dots, 1.64174 \dots

求解步骤

Represent the numbers with

x and y

:

number 1 : x

number 2 : y

A.T.Q.:

x y = 4.2

x + y = 4.2

x y = 4.2, x + y = 4.2 : (x = 1.64174 \dots, y = \frac{21 + 21}{10} x = 2.55825 \dots, y = \frac{21 - 21}{10})

\frac{21 + 21}{10} = 2.55825 \dots

\frac{21 - 21}{10} = 1.64174 \dots

The numbers : 1.64174 \dots, 2.55825 \dots or 2.55825 \dots, 1.64174 \dots

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