Question

resolva as esquaçoes x⁴+36-20x²=0 alguem pra me ajuda pfvr??

Answer 1

( x ) 4 - 20 x2 + 36 = 0

y2 - 20y + 36 = 0
∆ = 400 - 144
∆ = 256
Y1 = 20 + 16 / 2
Y1 = 36 / 2
Y1 = 18
Y2 = 20 - 16 / 2
Y2 = 4 / 2
Y2 = 2

X1= √18
X1 = + 3√2 e - 3√2
X2 = +√2 e. - √2