Factor the polynomial expression 4x2 +9.

Step-by-step explanation:

Factor it by first setting it equal to 0:

Now subtract 9 from both sides:

Divide both sides by 4:

Then take the square root of both sides:

x = ± , which of course is not allowed. Therefore, we have to allow for the imaginary numbers in this solution. Knowing that,

x = ± is an equivalent radicand, we can now replace -1 with its imaginary counterpart:

x = ±

Each one of the elements in the radicand are perfect squares, so we simplify as follows:

x = ±

And there you go!

she played for 18.75 hours.

step-by-step explanation:

if she played 2/4 of a hour on tuesday. and there is 60 minutes in an hour and 60 divided by 4 is 7.5. and she played 2/4 of an hour on thursday then again 60 divided by 4 is 7.5, you add 7.5+7.5=56.25. now you have to do 1/4 of an hour, it equals 3.75. now you have to add them all up. 3.75+7.5+7.5=18.75

i hope this and i hope you get it right. it took me a while to get this done for you. : )