Question

Solve for x.

2x2 - 4x = 0

0, -4

0, -2

0, 2

2, 4

Answer 1

Factor the expression 2x^2-4x first

Answer 2

factor out 2x, and you'll get

2x(x-2)=0

Now when you multiply two numbers, say A and B and together they are 0: A.B =0
Then what can you say for certain about at least one of the two?

Answer 3

so is it b

Answer 4

x-2=0 when x=?

Answer 5

2

Answer 6

Right, and what does x equal if 2x = 0?

Answer 7

You have either 2x=0 or x-2=0... so two possible solutions