Question

determine as raizes da equação x2-50x2+49=0 sendo U=R

Answer 1

(√9x - 14 )² = 2²

9x - 14 = 4

9x = 4 + 14

x = 18/9

x = 2

( √5x + 4 )² = ( 2x + 1 )²

5x + 4 = 4x² + 4x + 1

4x² + 4x - 5x + 1 - 4 = 0

4x² - x - 3 = 0

x = 1 + - √1 +48/8

x = 1 + - √49/8

x' = 1 + 7/8

x' = 1

x" = 1 - 7/8

x" = - 6/8

x" = - 3/4