Question

t*2-13t+36=0
Alguem me ajuda
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Answer 1

x⁴ -13x² +36=0 => -13/+36= -4-9/-4×-9

(x² -4) . (x² -9)=0

(x²=4). (x²=9)

x=±2. x=±3 <=====©