Question

if x is a natural number.
a) which number is to be added to x2+4x to make it a perfect square?
b) if x2 + ax + 49 is a perfect square,what is a?
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Answer 1

Step-by-step explanation:

x2+4x

let x=2 and x=3

x2+4x=2(2)+4(3)

=4+12

=16......