Me with 3& complete the square.

I hope this helps you

1)

1.x^2+8x-6=0

D=8^2-4.1. (-6)

D=88

x1= -8+square root of 88/2.1

x2= -8- square root of 88/2.1

3)

x^2-10x-32=0

D=(-10)^2-4.1. (-32)=228

x1=10+square root of 288/2.1

x2=10- square root of 288/2.1

5)

x^2+4x+10=0

D=4^2-4.1.10= -24

x1=-4+2i.square root of6/2.1

x2= -4-2i.square root of 6/2.1