Question

(3) (a + 18)(a - 20)​

Answer 1

Answer:

a² + 38a + 360

Step-by-step explanation:

(a + 18)(a + 20) = a² + 20a + 18a + 360

= a² + 38a + 360

Hope it helps you:)

Answer 2

Answer:

( a)^2+( 18 -20 )( a )+( 18 )( -20 )

a^2+(-2)a+(-360)

a^2-2a-360