Sentence 17: ({left( { – 9.x} right)^2} ) is equal to:

Sentence 17: ({left( { – 9.x} right)^2} ) is equal to: A. (18. {x^2}) B. (-81. {x^2}) C. (-18. {x^2}) D. (81. {x^2}) We have ({left( { – 9.x} right)^2} = {left( {9.x} right)^2} = {9^2}. {x^2} = 81. { x^2}) ===============

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