Question

Someone help me pls

Answer 1

Area of rectangle = length × Width

= [ 3 × ( a+4) ] × [ 2 ( a+5 ) ]

= [ 3a + 12 ] × [ 2a + 10 ]

= 12a + 30a + 24a + 120

=

`6 {a}^(2) + 54a + 120`

Answer 2

Area of Rectangle: Width × Length

`2(a + 5) * 3(a + 4)`

Distribute 2 in a+5 and 3 in a+4 first.

`(2a + 10) * (3a + 12)`

Then we multiply both polynomial.

`(2a * 3a) + (2a * 12) + (10 * 3a) + (10 * 12) \\ 6 {a}^(2) + 24a + 30a + 120`

`6 {a}^(2) + 54a + 120`

Therefore the answer is 6a²+54a+120