Question

Find the roots of X^2-66x+189=0

Answer 1

Answer:

x²-66x+189=0

x²-63x-3x+189=0

x(x-63)-3(x-63)=0

(x-3)(x-63)=0

x=3,63

Answer 2

Answer:

x²-66x+189

x²-63x-3x+189

x(x-63)-3(x-63)

(x-63)(x-3)

if x-63 is=0

x=63

if x-3=0

x=3