49(x-3)²=16(x+6)²(因式分解)
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49(x-3)²=16(x+6)²(因式分解)
49(x-3)²=16(x+6)²(因式分解)
49(x-3)²=16(x+6)²(因式分解)
49(x-3)²=16(x+6)²
49(x-3)²-16(x+6)²=0
[7(x-3)+4(x+6)][7(x-3)-4(x+6)]=0
(11x+3)(3x-45)=0
x1=-3/11,x2=15