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(x+4)(x+5)=0
x=-4 atau x=-5
b.
(2x+1)(x+2)=0
x=-1/2 atau x=-2
c.
(x-5)(x+3)=0
x=5 atau x=-3
d.
(2x-1)(2x-1)=0
x=1/2
x + 4 = 0
x = -4
atau
x + 5 = 0
x = -5
b. (2x + 1) (x + 2) = 0
2x + 1 = 0
x = -1/2
atau
x + 2
x = -2
c. (x - 5) (x + 3) = 0
x - 5 = 0
x = 5
atau
x + 3 = 0
x = -3
d. (2x - 1) (2x - 1) = 0
2x - 1 = 0
x = 1/2