It's a second degree trinomial expression in x.
It's a perfect square, being the square of (x-2).
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4x2+4x-8 4(x2+x-2) and (4x+8)(x-1)
4x2 - 4 is a polynomial of degree two.
4(x - 1)(x + 1)
sqrt(4x+7) -4 = sqrt(4x-1) squared : (sqrt(4x+7) -4)2 = 4x-1 (4x+7) - 2x4xsqrt(4x+7) +16 = 4x-1 -8xsqrt(4x+7) = -24 sqrt(4x+7) = -24/-8 = 3 squared : 4x+7 = 32 = 9 4x = 9-7 = 2 then x=1/2
4(x+y)^2