Toán Lớp 8: tìm x:
a, 3(2x-1) . (3x+1) + (2x-3) . (9x-1)= 0
b, (x+2) . (x ² – 2x +4 ) – x(x ² +2 ) = 5
c, 3(x+2) ² + (2x – 1) ² -7(x+3)(x+3) = 36
d, (x+3)(x+2) – (x-2)(x+5) = 6
e, 3(2x-1)(3x-1) – (2x-3)(9x-1) = 0
Toán Lớp 8: tìm x: a, 3(2x-1) . (3x+1) + (2x-3) . (9x-1)= 0 b, (x+2) . (x ² – 2x +4 ) – x(x ² +2 ) = 5 c, 3(x+2) ² + (2x – 1) ² -7(x+3)(x+3) =
By Khánh Ngân
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