Question

What is the solution set of 7x^2 + 3x = 0?

{0, 3/7}
{0, -3/7}
{0, -4/7}

Answer 1

Take x common..

Answer 2

how?

Answer 3

x (7x + 3) = 0

then x = 0 or -3/7

Answer 4

x(7x + 3) = 0..

Answer 5

Now when the product of two numbers is zero??
If one of the number must be zero..
So either x = 0 or (7x + 3) = 0
Find x from here...