Answer:
5x^2 - 20x.
Explanation:
a(b +c ) = ab + ac is the distributive property, so we have:
5x(x - 4)
= 5x*x + 5x * -4
= 5x^2 - 20x.
5x² - 20x
multiply each term in the parenthesis by the 5x outside
= (5x × x ) + (5x × - 4 )
= 5x² + (- 20x) = 5x² - 20x
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