Question

$4 {x}^{2} - 9x = 0$
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Answer 1

4x² - 9x = 0

x(4x - 9) = 0

x' = 0

4x - 9 = 0

4x = 9

x = 9/4

x'' = 2,25

S = {0 ; 2,25}

®!