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X:
0=x^2+7x+10
:7
:10
: 5, 2 (5+2=7)
:
0=(x+5)(x+2)
x+5=0\-5
x=-5
x+2=0\-2
x=-2
y
:
y=0^2+7*0+10
7*0=0
0^2=0
y=0+0+10
y=10
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