Question

RESOLVA AS EQUAÇÕES


3 (x *ao quadrado* - 1) = 24

2 (x *ao quadrado* -1) = x *ao quadrado* +7

5 (x *ao quadrado* -1) = 4 (x *ao quadrado* +1)

(x × 3) (x-4) + 8= x

Answer 1

x² -1 = 24/3

x = ±√9

{3 , -3}

2x² -2 = x² + 7

2x² -x² = 7 + 2

x = ±√9

{3 , -3}

5x² -5 = 4x² +4

5x -4x = 4 + 5

x = ±√9

{3 , -3}

3x(x -4) +8 = x

3x² -13x +8 = 0

$\Delta = b^{2} -4ac$

169 -4*24 = 73

$x = \frac{-b \pm \sqrt{\Delta} }{2a}$

13 ± √73/6