The answer says it's (a-3)(a+3)(a-1)(a+1)
^but I don't know how the hell you get that answer. doesn't a^4 become a^2 and a^2? And 9 becomes 3 and 3 since 3 times 3 equals 9? So wouldn't it be (a^2 + 3)(a^2 + 3) AKA (a^2 +3)^2
^but I don't know how the hell you get that answer. doesn't a^4 become a^2 and a^2? And 9 becomes 3 and 3 since 3 times 3 equals 9? So wouldn't it be (a^2 + 3)(a^2 + 3) AKA (a^2 +3)^2
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(a^2 - 1)(a^2 - 9)
That's the answer. Factor it out!
That's the answer. Factor it out!
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a^4 - 10a^2 + 9
a^2(a^2 - 10) = - 9
1. a^2 = - 9
a = 9i
2. a^2 = 10
x = 3.16
a^2(a^2 - 10) = - 9
1. a^2 = - 9
a = 9i
2. a^2 = 10
x = 3.16