Question

Dimitri thinks of two numbers. They add together to make 17 and multiply to make 60 ​

Answer 1

Explicație pas cu pas:

$x + y = 17 \\ xy = 60$

$x = 17 - y \\ (17 - y)y = 60 \\ {y}^{2} - 17y + 60 = 0 \\ (y - 5)(y - 12) = 0$

$x = 12; y = 5 \\ x = 5; y = 12$