Please help with practice problems 1 and 2.

1.

Find the second-order Taylor formula for f (x, y) = (9x + By)2 at X0 = (0, 0). Note that [R2 (0, h) = 0 in this case. (Use symbolic notation and fractions where needed. Give your answer in the form of f(h1, 112) = f (I, m) where I = h] and m = '12-) foam) = 81x2 +64y2 +14%; Incorrect Find the second-order Taylor formula for f(x, y) = 11 sin(xy) + 6 cos(x y) at (0,0). (Use symbolic notation and fractions where needed. Give your answer in the form of f(h1, kg) = f (I, m) Where I = h] and m = '12.) Incurred