Question

como resolver x²-72=360-5x

Answer 1

x² - 72 = 360 - 5x
x² + 5x - 72 - 360 = 0
x² + 5x - 432 = 0

baskara ----     x = -b +- Vb² - 4ac/2a

a = 1
b= 5
c= -432

x= -(5) +- V 5² - 4 . 1 . - 432 / 2 .1
x = - 5 +- V 25 +1728 /2
x = -5 +- V 1753/2
x'= - 5 + V 1753                         não existe raiz quadrada de 1753
                   2
x" = - 5 - V1753
                    2

Answer 2

 x²-72=360-5x

 x² - 72 - 360 + 5x  = 0
   x² + 5x - 432 = 0

 delta = (5)^2 - 4.1.(-432)==> 25+1728==> 1753

x= -5 +/-V1753 ==> x= - 5 +/- V1753
             2.1                                 2