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1st-6th gradeAlgebra

Question contentwhy? what's the method of this problem?

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answer user profile imageQanda teacher - Neelima
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answer user profile imageStudent

by what method is this??

answer user profile imageQanda teacher - Neelima
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answer user profile imageStudent

thank you!

Similar problem
search-thumbnail-$16$ In deriving the quadratic formula, what is the process before taking 
the square root of $x+\dfrac {b} {2a}=\dfrac {±\sqrt{\bar{b2-4ac} } } {2a}$ 
A. $\left(x+\dfrac {b} {2a}\right)^{2}=\dfrac {+\left(b^{2}-4ac\right)} {4a^{2}}$ C. $\left(x+\dfrac {b} {2a}\right)^{2}=\dfrac {-b^{2}-4ac} {4a^{2}}$ 
$B$ $\left(x+\dfrac {b} {2a}\right)^{2}=\dfrac {b^{2}-4ac} {4a^{2}}$ D. $\left(x+\dfrac {b} {2a}\right)^{2}=$ $\dfrac {b^{2}-4ac} {4a^{2}}$
10th-13th gradeOther
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