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Question 9 Unsaved For all x, (2x+3)^2=? Question 9 options: 4x^2+9 4x^2+6x+9 4x^2+6 4x^2+12x+9
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2 votes
Question 9 Unsaved For all x, (2x+3)^2=? Question 9 options: 4x^2+9 4x^2+6x+9 4x^2+6 4x^2+12x+9

User Hyoung
by
5.7k points

1 Answer

5 votes

Use
(a+b)^2=a^2+2ab+b^2


(2x+3)^2=(2x)^2+2(2x)(3)+3^2=4x^2+12x+9

User Nvogel
by
5.3k points
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