1) x^2+2x+10=4x^2+1-4x
3x^2-6x-9=0
x^2-2x-3=0
x1=3
x2=-1
2) x+17=16+x-7+8sqrt(x-7)
8sqrt(x-7)=8
sqrt(x-7)=1
x=8
1) x^2+2x+10=4x^2+1-4x
3x^2-6x-9=0
x^2-2x-3=0
x1=3
x2=-1
2) x+17=16+x-7+8sqrt(x-7)
8sqrt(x-7)=8
sqrt(x-7)=1
x=8