Question 884831
the area(A) of a parallelogram = base times altitude
x^2 -4 = (x+4)*(x-3)
x^2 -4 = x^2 +x -12
subtract x^2 from both sides of =
-4 = x -12
add -12 to both sides of =
x = 8
check the answer
8^2 -4 = (8+4)*(8-3)
64 -4 = 12 * 5
60 = 60
our answer checks
A = 60