1.

What must be added to 4² + 12x + 5 to make it aperfect square?​

Answer»

Answer:

2 is the answer

Step-by-step explanation:

4x2−12x+7  

=(2x)2−2∗2x∗3+7  

(a+b)2=a2+2∗a∗b+b2  

Here ,  a=2x,b=−3  

=(2x)2+2∗2x∗(−3)+32  

=4x2−12x+9  

=>  We have to add  2  to make PERFECT square

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