Question

разложите на множители -0,16х^2+у^2

Answer 1

( y - 0.4x )*( y + 0.4x )

Answer 2

$- 0.16 {x}^{2} + {y}^{2} = {y}^{2} - 0.16 {x}^{2} = \\ = (y - 0.4x)(y + 0.4x)$