Question

Can someone explain how to solve this please! Medal!
(2x – 1)(x + 7) = 0

Answer 1

http://wolframalpha.com/

Answer 2

$$
(2x – 1)(x + 7) = 0\\
2x\times x+2x\times 7-1\times x-1\times 7=0
$$
Does this make sense?
Can you simplify?

Answer 3

Put the two brackets separately =0 and solve

Answer 4

A simpler way is this
$$
x+7=0\\
2x-1=0
$$
Because in the product, if EITHER of these is zero, the whole thing is zero.

So you will have TWO solutions. That means two different values for x.

Answer 5

You will get two valves of x

Answer 6

For x+7=0

What value of x will make this equal to zero?

Answer 7

Just substract 7 from both side

Answer 8

Another value of x is 1/2 tell me how?

Answer 9

Do you understand ?

Answer 10

yes but can you do a summary of it all in one post im not really seeing it together

Answer 11

First
x+7=0 (substract 7 from both side)
x=-7
Second
2x-1=0 (add 1 both side)
2x=1. (divide by 2 both sides)
x=1/2
So you get x=-7 and1/2