Question

EQUAÇAO BIQUADRADA
X4-29X²+100=0
OBS ; o quatro e em cima do x

Answer 1

(X²)²-29x²+100=0 substituimos tds x² por y y²-29y+100=0 841-400 ∆=441 -b+-√∆/2a 29+-21/2 x¹=25/x²=4

Answer 2

x4=y²
x² = y

y² + 29y+100= 0
Δ = b²-4ac
Δ = 29² -4.1.100
Δ = 841-400 = 441
√ Δ =21
x = - b ± √∆ 
            2a 
y=-29±21/2
y'=-29+21/2=-4

y''=-29-21/2=-25

x4=y² --> (-4)² = 16
x² = y -->-4