Class 7 Algebra Math Problem | You need To Know This Trick In Math Algebra.

[@danielfranca1939]

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[@SidneiMV]

x⁴ - 16 = x² - 4
(x² + 4)(x² - 4) - (x² - 4) = 0
(x² - 4)(x² + 3) = 0
x² - 4 = 0 => *x = ± 2*
x² + 3 = 0 => *x = ± i√3*

[@MeinhartKöster]

what about checking x3 and x4 (plus/minus i times square root 3?

[@WorldwideBibleClass-qr9jk]

I solve it in my head in just 5Seconds...😂😂😂😂.

[@AbbasGuclu-jn3po]

x=+-2; i×(+-sqrt3)