# Answer to Question #7836 in Abstract Algebra for Crystal

Question #7836

(8x+9)power of 2

Expert's answer

In general case, (a+b)^2=a^2+2ab+b^2

So we have

(8x+9)^2=64x^2+2*8*9x+81=64x^2+144x+81

So we have

(8x+9)^2=64x^2+2*8*9x+81=64x^2+144x+81

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