Question

9 - 4d² = 8. Solve with step by step explanation
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Answer 1

Answer: 2

Step-by-step explanation:

9 - 4d² = 8

9 - 8 = 4d²

1 = 4d²

d² = 1/4

d = 2

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Answer 2

Answer:

d= 1÷2

Step-by-step explanation:

9-4d² = 8

9-4d²+4d² = 8+4d²                (add 4d² on both sides)

9=8+4d²

1=4d²                        (subtract 8 from both sides)

1÷4 = d²                      (divide both sides by 4)

√(1÷4) =√d²                 (taking square root of both sides)

1÷2 = d