1.

Using the identify (a + b)2 = a2 + 2ab + b2 simplify the following.(x2 + 5)2

Answer»

Using the identity 

(a + b)2 = a2 + 2ab + b2 

(x2 +5)2 = (x2)2 + 2.x2.5 + 52 

= x4 + 10x2 + 25



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