It's all on the picture ​

subtract 12 from both sides of the equal sign

-since you are trying to find h

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

happy to

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