h:xto2−12x−3
h(x)=2(2x−3)−12x−3=4x−72x−3
Let x = h(y)
x=4y−72y−3
x(2y−3)=4y−7implies2xy−4y=3x−7
y=3x−72x−4
h−1(x)=3x−72x−4
∴h−1(12)=3(12)−72(12)−4
= −112−3=116