Question

Coloque na forma ax²+bx+c=0 as seguintes equações :
A) 5x+3x²=4x-7
B)x²+4x=2.(x-1)
C)x.(x-2)+1=2.(x+3)

Answer 1

a) 5x + 3x² = 4x - 7
3x² + 5x - 4x + 7 = 0
3x² + x + 7 = 0


b) x² + 4x = 2.(x - 1)
x² + 4x = 2x - 2
x² + 4x - 2x + 2 = 0
x² + 2x + 2 = 0


c) x. (x - 2) + 1 = 2.( x + 3 )
x² - 2x + 1 = 2x + 6
x² - 2x - 2x + 1 - 6 = 0
x² - 4x - 5 = 0