Question

How do you expand `(x+15)(x+3)`?

Answer 1

`(x+15)(x+3)=x^2+18x+45`

Explanation:

`(x+15)(x+3)` now using distributive property

= `x(x+3)+15(x+3)` and again using the distributive property

= `x^2+3x+15x+45`

= `x^2+18x+45`