What must be added to 4² + 12x + 5 to make it a
perfect square?
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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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