-4 (x - ) (x - )
Объяснение:
ax² + bx + c = a (x - x1) (x - x2)
x1 =
x2 =
-4x² + 2x + 5 = -4 (x - ) (x - )
-4 (x -
) (x -
)
Объяснение:
ax² + bx + c = a (x - x1) (x - x2)
x1 =![\frac{1-\sqrt{21} }{4}](/tpl/images/1167/3358/0d008.png)
x2 =![\frac{1+\sqrt{21} }{4}](/tpl/images/1167/3358/774df.png)
-4x² + 2x + 5 = -4 (x -
) (x -
)