Answer:
h = (A - 9)/6
Explanation:
Step 1: Define
A = b² + 2bh
b = 3
Step 2: Substitute
A = (3)² + 2(3)h
Step 3: Evaluate and solve for h
A = 9 + 6h
A - 9 = 6h
(A - 9)/6 = h
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