Question

which one of the following algebraic expression must be added to
${a}^{2} + {b}^{2}$
so that the sum is a perfect square.
i. 4ab
ii. -4ab
iii. 2ab or -2ab
iv. 0
please answer and EXPLAIN. if ure correct and also explained I'll mark u as brainliest. ​

Answer 1

Answer:

$hey \: mate$

Step-by-step explanation:

One of the following algebraic expressions must be added to =>

iii) 2ab or -2ab

$= > {a}^{2} + {b}^{2} + 2ab$

and

$= > {a}^{2} + {b}^{2} - 2ab$