Find All X-Intercepts of the Function $$f ( x ) = x ^ { 4 } - 13 x ^ { 2 } + 36$$

question 148

Multiple Choice

Find all x-intercepts of the function.
- $$f ( x ) = x ^ { 4 } - 13 x ^ { 2 } + 36$$

• A) \[( \pm 2,0 ) , ( \pm 3,0 )\]
• B)(2, 0), (3, 0)
• C)(4, 0), (9, 0)
• D) \[( \pm 2 \mathrm { i } , 0 ) , ( \pm 3 \mathrm { i } , 0 )\]

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