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Question Number 100561 by DGmichael last updated on 27/Jun/20
Commented by bramlex last updated on 27/Jun/20
x−y=x3−y3x2+xy+y2x=3+9+125273,y=−3+9+125273x−y=6(3+9+12527)23+125273+(−3+9+12527)23=653+18+12527+69+125273+18+12527−69+125273
Answered by MJS last updated on 27/Jun/20
AisthesolutionofA3+pA+q=0CardanoA=−q2+q24+p3273+−q2−q24+p3273==−q2+q24+p3273−q2+q24+p3273q2=3⇒q=6q24=9⇒q=±6⇒q=6p327=12527⇒p=5A3+5A+6=0⇒A1=−1∧A2,3=12±232i⇒A=A1=−1
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