Now factorise or use the quadratic formula to solve for h.
i worked out the answer last night, but i need my working out and i forgot how i did it
this is a small part of the equation, and the last part i need to figure out how i worked out.
9h + 2(81 + h²)= 230
i already worked out that h= 4 but cant remember how so, and need to present working out.