(5-x)²= (4-x)(x+4)
25-10х+х^2=16-x^2
2x^2-10x+9=0 |:2
x^2-5x+4,5=0
D=(-5)2 - 4·1·4.5=7
x1=(5+)/2=+
x2=(5-)/2=-
(5-x)²= (4-x)(x+4)
25-10х+х^2=16-x^2
2x^2-10x+9=0 |:2
x^2-5x+4,5=0
D=(-5)2 - 4·1·4.5=7
x1=(5+
)/2=
+![\frac{1}{2}](/tpl/images/1324/2408/9cdae.png)
![\sqrt{7}](/tpl/images/1324/2408/69133.png)
x2=(5-
)/2=
-![\frac{1}{2}](/tpl/images/1324/2408/9cdae.png)
![\sqrt{7}](/tpl/images/1324/2408/69133.png)