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07-10-2018
Mathematics

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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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07-10-2018

Use [tex](a+b)^2=a^2+2ab+b^2[/tex]

[tex](2x+3)^2=(2x)^2+2(2x)(3)+3^2=4x^2+12x+9[/tex]

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