Question

Expand (a + 3) (a + 5).
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Answer 1

Answer:

(3-5) a+a

-2 =2a

-1 answer

Answer 2

$\sf{Answer}$

To expand ( a + 3) ( a + 5)

That means we have to find product of (a+3)(a+5)

So, product of ( a +3) ( a + 5) =

(a +3) ( a + 5) = a ( a + 5) + 3 ( a + 5)

( a + 3) ( a+5) = a² + 5a + 3a + 15

(a + 3) ( a+5) = a² +8a + 15

So, the product of (a + 3) ( a+5) = a² +8a + 15

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Know more some algebraic identities

( a + b)² = a² + 2ab + b²

( a -b)² = a² - 2ab + b²

( a +b) ( a -b) = a² - b²

( a + b)² -2ab = a² + b²

( a + b)² + ( a-b)² = 2a² + 2b²

( a + b + c)² = a² + b² + c² + 2ab + 2bc + 2ca

a + b + c = 0 then a³ + b³ +c³ =0

( a + b)³ = a³ + b³ +3ab( a+b)

( a -b)³ = a³-b³ -3ab ( a-b)