Thanks
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16, x+4 ^ 2
When you start with x^2, it's simply a matter of halving the 8 from 8x and then squaring that.
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When you start with x^2, it's simply a matter of halving the 8 from 8x and then squaring that.
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(x+a)(x+a) = x^2 + 8x + c
x^2 + 2ax + a^2 = x^2 + 8x + c
so 2a = 8 or a = 4
and c = a^2 = 4^2 = 16
x^2 + 2ax + a^2 = x^2 + 8x + c
so 2a = 8 or a = 4
and c = a^2 = 4^2 = 16