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x² = 144
x = √144 = 12
b.))16x² + 24x = 0
(16x + 24)(x + 0) = 0
16x + 24 = 0
16 x = -24
x = -24/16 = -6/4 = -3/2
atau
x + 0 = 0
x = 0
c.)) x²-3x-54 = 0
(x-9)(x+6) = 0
x-9=0
x = 9
atau
x + 6 = 0
x = -6
d.)) 6x²-6x-12 = 0
(6x+6)(x-2) = 0
6x + 6 = 0
6x = -6
x = -6/6 = -1
atau
x-2 = 0
x = 2
= 114
x = √144
x = 12
b.
8x ( 2 x + 3 ) = 0
8x = 0 -----> x = 0/8 = 0
2x + 3 = 0 -----> 2x = -3
x = - 3/2
c.
x(x-9)+6 ( x -9)
(x-9)(x+6)
x-9 =0
x = 9
x+6 = 0
x = -6
d.
6x ( x +1) -12 ( x +1)
(x + 1) ( 6x - 12)
x+ 1 = 0
x = -1
6x -12 = 0
6x = 12
x = 2