Answer:
Area: (x^2)-(9x/2)-2 3rd side=4x+9
Step-by-step explanation:
First, let's find the third side. If all of the sums add up to 7x+5, then we can easily subtract the two sides that we do have.
2x+1+x-5=3x-4
Now, you have to ask yourself what added to 3x-4 can be equal to 7x+5.
It's 4x+9 because we combine like terms. That's the third side. Now, we should follow the formula for getting the area of triangle using the side lengths:
(2x+1)(x-5)/2=area of triangle
2x*x=2x^2
2x*-5=-10x
x*1=x
-5*1=-5
Now the total is 2x^2-9x-4 when you continue to combine like terms. Now all we have to do is divide by 2. So, the area is 2x^2-9x-4/2. You can simplify that. Answer is up top.
