Jawapan

  • Pengguna Brainly
2016-01-18T21:46:09+08:00
A) x^2 - 16 = 0
    ( x - 4 ) ( x + 4 ) = 0
    x = 4 , x = - 4

b) y^2 - 36 = 0
    ( y - 6 ) ( y + 6 ) = 0
    y = 6 , y = - 6

c) z^2 - 1/49 = 0
    49x^2 - 1 = 0
    ( 7x - 1 ) ( 7x + 1 ) = 0
    x = 1/7 , x = - 1/7

d) h^2 - 81 = 0
    ( h - 9 ) ( h + 9 ) = 0 
    h = 9 , h = - 9
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