faithlizabeth faithlizabeth

10-05-2022
Mathematics

contestada

Which values of x make this equation true?
x²+x=12
f. - 6 and 2
h. - 3 and 4
g. -4 and 3
j. - 2 and 6

Respuesta :

davidmaharjan62 davidmaharjan62

13-05-2022

Answer:

[tex] {x}^{2} + x = 12 \\ {x}^{2} + x - 12 = 0 \\ {x }^{2} + 4x - 3x - 12 = 0 \\ x(x + 4) - 3(x + 4) = 0 \\ (x + 4)(x - 3) = 0 \\ either \: \: \: or \: \\ x = - 4 \: \: \: \: \: \: \: \: \: \: \: \: x = 3[/tex]

the answer is -4 and 3

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