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21-11-2021
Mathematics

contestada

U+t=7
Ut=12
Solve simultaneously using formula method

Respuesta :

noname4217 noname4217

21-11-2021

Answer:

U= 10 or 11 T=-4 or-3

Step-by-step explanation:

solved using substitution not sure what the formula method is

U+T=7

UT=12

U=12/t

12/t+t=7

12/t=7-t

12=7t-t^2

t^2+7t+12=0

(t+4)(t+3)

t=-4, -3

u-4=7

u=11

u-3=7

u=10

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