Grade 119 grade maths
if 4x^2-12x+ k is a perfect square. Find the numerical value of k
1 Answer
Harshit Panwar
Approved Tutor Answer8 Years ago4x2-12x+k
=√4x2=2x
So, a=2x
2ab=2(2x)(b)
-12x=4x×b
b=-3
k=b2
k=9
Therefore, value of k is 9.
Hope it helps
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