(1)25x²-36=0(x<0) (2)9(x+1/3)²=16

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(1)25x²-36=0(x<0) (2)9(x+1/3)²=16
(1)25x²-36=0(x<0) (2)9(x+1/3)²=16

(1)25x²-36=0(x<0) (2)9(x+1/3)²=16
(1) 25x²-36=0
x²=36/25
x=-6/5
(2)9(x+1/3)²=16
(x+1/3)²=16/9
x+1/3=正负4/3
x=-5/3或x=1

(1)25x²=36
x²=36/25
x=-6/5
(2)(x+1/3)²=16/9
x+1/3=4/3 或x+1/3=-4/3
x=1或x=-5/3