Asked by Nathan
Factor over {complex numbers}
9x^2 + 49
9x^2 + 49
Answers
Answered by
Reiny
how about ...
(3x + 7i)(3x - 7i) ?
check:
(3x + 7i)(3x - 7i)
= 9x^2- 49i^2, but i^2= -1
= 9x^2 - 49(-1)
= 9x^2 + 49
(3x + 7i)(3x - 7i) ?
check:
(3x + 7i)(3x - 7i)
= 9x^2- 49i^2, but i^2= -1
= 9x^2 - 49(-1)
= 9x^2 + 49
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