if x +1=7,what is the. value of x2+2x+1?
if x +1=7 then x = 6
x^2+2x+1
= 6^2 + 2(6) + 1
=36 + 12 + 1
=49
value of x2+2x+1 is 49
x=5 52+25+1=21 is the answer
