IDNStudy.com, ang iyong mapagkukunan para sa malinaw at mabilis na mga sagot. Tuklasin ang malawak na hanay ng mga paksa at makahanap ng maaasahang sagot mula sa mga bihasang miyembro ng aming komunidad.
Answer:
11 and 5
Step-by-step explanation:
Let x and y be the two numbers
First statement says "sum of two numbers is 16", so ...
[tex]x + y = 16[/tex]
and the second statement says "sum of their squares is 146", so ...
[tex] {x}^{2} + {y}^{2} = 146[/tex]
Using substitution method
[tex]x + y = 16 \\ y = 16 - x[/tex]
Substitute the y to 2nd equation
[tex] {x}^{2} + {y}^{2} = 146 \\ {x}^{2} + {(16 - x)}^{2} = 146 \\ {x}^{2} + 256 - 32x + {x}^{2} = 146 \\ 2 {x}^{2} - 32x + (256 - 146) = 0 \\ 2 {x}^{2} - 32x + 110 = 0[/tex]
[tex]{x}^{2} - 16x + 55 = 0 \\ (x - 11)(x - 5) = 0[/tex]
In this case, if ...
[tex]x - 11 = 0 \\ x = 11[/tex]
then
[tex]y = 16 - 11 \\ y = 5[/tex]
And if
[tex]x - 5 = 0 \\ x = 5[/tex]
then ...
[tex]y = 16 - 5 \\ y = 11[/tex]
So it means the two numbers are 11 and 5