Answer:
[tex]\huge\boxed{A=4d^2+4h}[/tex]
Step-by-step explanation:
[tex]\dfrac{1}{4}A-h=d^2\qquad\text{add}\ h\ \text{to both sides}\\\\\dfrac{1}{4}A-h+h=d^2+h\\\\\dfrac{1}{4}A=d^2+h\qquad\text{multiply both sides by 4}\\\\4\!\!\!\!\diagup^1\cdot\dfrac{1}{4\!\!\!\!\diagup_1}A=4d^2+4h\\\\A=4d^2+4h[/tex]
