2 answers:
Answer:

(x = Plus or minus 2 StartRoot 7 EndRoot)
Step-by-step explanation:
Since b=0, we can simply operate it this way:

98 - x² = 0
x² = 98
x = ±√98
Lets factor 98
98 | 2
49 | 7
7 | 7
1
So, 98 = 2 . 7 . 7 = 2 . 7²
x = ±√2.7²
x = ±7√2
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