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webwork / hs rowe cpma / 5.5 multiplying polynomials / 10
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5.5 multiplying polynomials: probl
(1 point)
the expression $(2x + 4)^2$ equals $x^2+x+$
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Explanation:

Step1: Expand using formula

Use the formula \((a + b)^2=a^{2}+2ab + b^{2}\). Here \(a = 2x\) and \(b = 4\).

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Step2: Calculate each term

Calculate \((2x)^{2}=4x^{2}\), \(2\times(2x)\times4 = 16x\), and \(4^{2}=16\).

Answer:

\(4x^{2}+16x + 16\)