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Anonymous
It is: 1/2 plus 1/2 = 1
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Three-fourths.
half of 1 is 1/2
1.5 or 1 1/2
1 divider by 1 half is .5!
Complete the square. X^2 + 2X halve the linear term ( 2 ), square it and add to polynomial X^2 + 2X + 1