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iloveutwoon782k
2 năm trước
a) x^2-9=(x-3)(5x+2) e) (3x+5)^2 =(x-1)^2 b)x^3-1=(x-1)(x^2-2x+16) f) 9( 2x+1)^2 =4(x-5)^2 c)4x^2(x-1)-x+1=0 g) x^2 + 2x = 15 d)x^3+4x^2-9x-36=0 h) x^4 -5x^3+4x^2=0
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