(2x + 1)(x - 5)
Simplify this by using the rainbow tactic. :)
(2x · x) + (2x · -5) + (1 · x) + (1 · -5)
Simplify!
(2x²) + (-10x) + (x) + (-5)
Get rid of the parenthesis.
** Remember : a negative times a positive is always a negative, and a negative times a negative is always a positive. **
2x² - 10x + x - 5
Add like terms.
2x² + (-10x + x) - 5
Since "-10x" & "x" have the same variable, we can simplify this.
Simplify.
2x² + (-9x) - 5
Get rid of parenthesis.
2x² - 9x - 5
~Hope I helped!~