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1) 9x^-4=0
2) x^ + 2x=0
3) -3x^-2x+1=0
4)x^-6x+9=0
5) x^ + 4x + 4 > 0
6) x^ - 3x -10 < lub = 0
7) 7x^ + 15 >0
-2x^+7 x + 4 >= 0
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1)
9x^ - 4 = 0
9x^ = 4 /:9
x^ = 4/9
x = 2/3
2)
x^ + 2x = 0
x (x + 2) = 0
x = 0 lub x+2=0
x = -2
3)
-3x^ - 2x + 1 = 0
pier. del= 4 +12 = 16
del= 4
x1 = 1/3
x2 = 1
4)
x^ - 6x + 9 = 0
pier. del = 36 - 36 = 0
x0= 6/2 = 3
5)
x^ + 4x + 4 > 0
x^ + 4x + 4 = 0
pier.del= 16 - 16 = 0
x0= - 4/2 = -2
6)
x^ -3x -10 =0
pier. del= 9 + 40 = 49
del= 7
x1= -4/2 = - 2
x2= 10/2 = 5
7)
7x^ + 15 > 0
7x^ > 15 /:7
x^ > 15/7
x > pier 15/7 lub x > - pier. 15/7
8)
-2x^ +7x + 4 = 0
pier.del= 49+32=81
del= 9
x1= 4 x2= - 1/2