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GnomeDePlume asked Sep 17, 2023

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Help me please and have a good day

Mathematics
high-school

GnomeDePlume asked Sep 17, 2023

by GnomeDePlume

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1 Answer

20 votes

Answer:

D)
$x = (8)/(3) \: or \: x = - (5)/(2)$

Explanation:

$6 {x}^(2) - x - 40 = 0 \\ 6 {x}^(2) - 16x + 15x - 40 = 0 \\ 2x(3x - 8) + 5(3x - 8) = 0 \\ (3x - 8)(2x + 5) = 0 \\( 3x - 8)(2x + 5) = 0 \\ 3x - 8 = 0 \: \: \: \: or \: \: \: 2x + 5 = 0 \\ x = (8)/(3) \: \: \: or \: \: \: x = - (5)/(2)$

A Mehmeto answered Sep 22, 2023

by A Mehmeto

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