Question

what term should be added to expression to make it a perfect square ​

Answer 1

$in \: the \: iven \: question \: \\ let \: a = {2} \\ so \: 2ab = 2 \times \: 2 \times b \\ 28a = 4b \: \\ so \: b = 7$

No a= 2a and b= 7

And

$( {a + b})^{2} = {a}^{2} + {b}^{2} + 2ab \\ so \: 49 \: should \: be \: added \: t \:o \: make \: it \: a \: perfevt \: squre$

Answer 2

Answer:

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