Question

find all real solutions of x^3−7x^2+12x=0

Answer 1

x^3-7x^2+12x = 0
x(x^2-7x+12) = 0
x[(x-3)(x-4)] = 0
x = 0, 3, 4

Answer 2

x(x2-7x+12)=0
x=0
x=3
x=4

Answer 3

can any of you solve this one, x^4-x^3-42x^2=0, so far i have x^2(x^2-x-42)=0