Question

from the sum of x2 +x+1 and x2- x+1,subract -x2 -x+1
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Answer 1

Answer:

2x + x + 1 + 2x - x +1= 4x + 2

then, 4x + 2 + 2x + x - 1 = 7x +1

may be this helps you....

Answer 2

Answer:

x+3

Explanation:

[(x2+x+1)+(x2-x+1)]-(-x2-x+1)

=[3x+1+x+1]-3x+1

=4x+2-3x+1

=x+3