Równania w załączniku dam naj
b) (3-x)^2+(2x+1)^2=5x^2
9-3x-3x+x^2+4x^2+2x+2x+1=5x^2
10-2x+5x^2=5x^2
10=2x
x=5
c) x^2-(x-4)(4+x)=2x
x^2-x^2+16=2x
16=2x
x=8
x^2/4-9=x^2/4-x+1
-9=-x+1
x=10
zad d
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b) (3-x)^2+(2x+1)^2=5x^2
9-3x-3x+x^2+4x^2+2x+2x+1=5x^2
10-2x+5x^2=5x^2
10=2x
x=5
c) x^2-(x-4)(4+x)=2x
x^2-x^2+16=2x
16=2x
x=8
x^2/4-9=x^2/4-x+1
-9=-x+1
x=10
zad d