jaskarnsc jaskarnsc
  • 22-09-2020
  • Mathematics
contestada

Can someone please do this substitution method question with the working out.

T = 1/2m^2+2m-4
T = 2m+4

Respuesta :

devishri1977
devishri1977 devishri1977
  • 22-09-2020

Answer:

Step-by-step explanation:

[tex]T = \frac{1}{2}m^{2}+2m - 4\\\\T = 2m + 4\\\\\frac{1}{2}m^{2}+2m - 4 = 2m + 4\\\\\frac{1}{2}m^{2}+2m - 4 - 2m - 4 = 0[/tex]

Combine like terms

[tex]\frac{1}{2}m^{2}+2m - 2m - 4 - 4 = 0\\\\\frac{1}{2}m^{2} - 8 = 0\\\\\frac{1}{2}m^{2} =8\\\\m^{2} = 8*2\\\\m^{2} = 16\\\\m = \sqrt{16}[/tex]

m = ± 4

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