Answer:
x - 2 units
Step-by-step explanation:
According to the question, the data provided is as follows
The area of the triangle with x^2 - 4
And, the leg has 2x + 4
Based on the above information, the length of the triangle other leg is
Let us assume
y = other leg lengths
So, the area of a triangle =
Now
So,
(x-2)(x+2) = (x+2)y
And, finally
x - 2 = y
Therefore the length of other leg is x - 2 units
7
→ Substitute x = -1 into - 5x + 2
-5 × -1 = 5
5 + 2 = 7