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Получается (1+(<span>2√2))²=9</span>
<span>x^6=(8x*9-15*9)
x^6=72x-135
x^6-72=135
x(x^5-72)=135
x=135 : x^5-75=135
x^5=135+75
x^5=60
</span>
X²+4x+4 = (x+2)² = (98+2)²=100²=10000
(-32+2)²=-30²=900
(-2.5+2)²=-0.5²=0.25