x² - 5x = 18 + 2x

x² - 5x = 18 + 2x

Question
Quadratics
asked 2021-01-06
\(\displaystyle{x}²-{5}{x}={18}+{2}{x}\)

Answers (1)

2021-01-07
We are given: \(\displaystyle{x}²-{5}{x}={18}+{2}{x}\)
Write in the form \(\displaystyle{a}{x}²+{b}{x}+{c}={0}\)
\(\displaystyle{x}²-{7}{x}-{18}={0}\)
Factor the left side: (x+2)(x-9)=0
By zero product property, x+2=0 and x-9=0
x=-2 and x=9
0

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