Question

Resolva as inequações:
a)3(x-4)+2x b)x2-6x+4<0
c)-x2-6x-9<0
d)x2+x>12

Answer 1

a) 3x -12 + 2x

5x - 12

b) 2x - 6x + 4 < 0

-4x + 4 < 0

-4x < -4

x > 1

c) x X 2 - 6x - 9 < 0

-2x - 6x - 9 < 0

-8x - 9 < 0

-8x < 9

x > - 9/8

d) x X 2 + x > 12

2x + x > 12

3x > 12

x > 4