Question

resolva as equaçao do 2 gral.sendo v=r
b)2(x²-1)=x²+7
c)5(x²-1)=4(x²+1)

Answer 1

Ola Luana

b) 

2*(x² - 1) = x² + 7

2x² - 2 = x² + 7

x² = 9 

x1 = 3
x2 = -3

c)

5*(x² - 1) = 4*(x² + 1)

5x² - 5 = 4x² + 4 

x² = 9

x1 = 3
x2 = -3

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