Question

用因式分解法解下列方程(x+1)(x-3)=5 3x的平方-x=0

Answer 1

(x+1)(x-3)=5

x^2-2x-3=5

x^2-2x-8=0

(x+2)(x-4)=0

x1=-2

x2=4

3x^2-x=0

x(3x-1)=0

x1=0

x2=1/3