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Q.

[[1]] is the factor of  x2+32x+4.


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Detailed Solution

When factoring a quadratic expression of the form ax2+bx+c using the middle term split method, we must split the middle term so that the sum equals b and the product equals ac. The given quadratic expression is x2+32x+4.
Now, we need to split the middle term in such a way that the sum is equal to  32   and the product is equal to 4. The proper splitting of the middle term is shown below.
32=22+2
Now, the factor of the given quadratic expression x2+32x+4
⇒x2+(22+2)x+4
⇒x2+22 x+2 x+4
⇒x(x+22)+2–√(x+22)
⇒(x+2)(x+22)
 
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