1) Solve the equations 4x^2 - 12x + 8 = 0 and 3x^3 - 12x + 30 = 0 for x. 2) Solve the equations x^2 - 12 = 0 and x^2 - 2 = 0 for x. 3) Solve the inequality 2r^3 + 6r > 0 for r.

1. 4)^ = l~xri2xU
i
^'cOrr i -3X^+12 Si X£C-¿X5y-2r330(a2lÍ3)
^•)(^-l2 Si XG f-2Í3,oVu(2r3,+6¿))
"3xV2=0 6á> X^=^ (W)X=2 o' X^-2_
SX^-IZ =0 ^ x = ¿i x=2 o y = -2-
1 W^TiGfo<^oo Ptvyo2r3> J
(cuuo ^CX3 -|(-x),^5 poL
fpJí^ |-)(l2xl = lX-l2xl
. -M22