Prove the identity (a + b)^2 = a ^2 + 2ab + b^2 for all natural numbers a, b.

Step-by-step explanation:

To prove the identity we just manually compute the left hand side of it, simplify it and check that we do get the right hand side of it:

(that's the definition of squaring a number)

(we distribute the product)

(we just use square notation instead for the first and last term)

(since product is commutative, so that ab=ba)

(we just grouped the two terms ab into a single term)

109 trust me

step-by-step explanation:

15% chance.

step-by-step explanation:

3/10 times, the 5 year old will get a tablet. 5/10 times, the 13 yer old will get a tablet. multiply both fractions to get 15/100 times, both would have a tablet.