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Anonymous
x2 is the same as x times x. In this case x = t+2 so we can say (t+2)2 is (t+2)(t+2) or t2+4t+4
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-t+2=12-t=10t=-10
t=-10
31
If you mean t^2 +11t +10 then it is (t+10)(t+1) when factorized