If the binary operation \(\ast\) is defined by m \(\ast\) n = mn + m + n for any real number m and n, find the identity of the elements under this operation
Factorize completely 81a\(^4\) - 16b\(^4\)
List all integers satisfying the inequality in -2 < 2x-6 < 4
X is due east point of y on a coast. Z is another point on the coast but 6.0km due south of Y. If the distance ZX is 12km, calculate the bearing of Z from X
