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9\left(x^{2}-4x+4\right)+8
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-2\right)^{2}.
9x^{2}-36x+36+8
Use the distributive property to multiply 9 by x^{2}-4x+4.
9x^{2}-36x+44
Add 36 and 8 to get 44.
9\left(x^{2}-4x+4\right)+8
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(x-2\right)^{2}.
9x^{2}-36x+36+8
Use the distributive property to multiply 9 by x^{2}-4x+4.
9x^{2}-36x+44
Add 36 and 8 to get 44.