Answers

2015-06-28T17:57:14+08:00
T²+8t+16=0
(t+8)(t+2)=0
t+8=0    t+2=0
t=-8       t=-2

x²-10x+25=0
(x-5)(x-5)=0
x-5=0   x-5=0
x=5      x=5

h²+6h-16=0
(h-2)(h+8)=0
h-2=0   h+8=0
h=2      h=-8

x²-5x-14=0
(x-7)(x+2)=0
x-7=0     x+2=0
x=7        x=-2


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