b2 + 16b + 64 can be factorized to (b+8)(b+8). If they were equal to zero as in b2 + 16b + 64=0 then b = -8.
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(-8 + b2) - (5 + b2) = -8 + b2 - 5 - b2 = -13
64 plus 64 plus 64 is 192.
in it's simplest form square root everything to get: a+b=8 i.e. a=8-b or b=8-a
The equation (b2 - 2b) + (3b - 6) = b2 + b - 6
a2