Giải các phương trình sau:
a) \( \left( {2x - 7} \right) \left( {4 - 5x} \right) = 0 \) b) \(8x \left( {3x - 5} \right) = 6 \left( {3x - 5} \right) \)
A.a) \(S = \left\{ {{7 \over 2};{4 \over 5}} \right\}\)
b) \(S = \left\{ {{5 \over 3};{3 \over 4}} \right\}\)
B.a) \(S = \left\{ {{5 \over 2};{4 \over 5}} \right\}\)
b) \(S = \left\{ {{7 \over 3};{3 \over 4}} \right\}\)
C.a) \(S = \left\{ {{7 \over 2};{4 \over 5}} \right\}\)
b) \(S = \left\{ {{4 \over 3};{5 \over 4}} \right\}\)
D.a) \(S = \left\{ {{5 \over 2};{4 \over 3}} \right\}\)
b) \(S = \left\{ {{5 \over 3};{3 \over 4}} \right\}\)
a) \( \left( {2x - 7} \right) \left( {4 - 5x} \right) = 0 \) b) \(8x \left( {3x - 5} \right) = 6 \left( {3x - 5} \right) \)
A.a) \(S = \left\{ {{7 \over 2};{4 \over 5}} \right\}\)
b) \(S = \left\{ {{5 \over 3};{3 \over 4}} \right\}\)
B.a) \(S = \left\{ {{5 \over 2};{4 \over 5}} \right\}\)
b) \(S = \left\{ {{7 \over 3};{3 \over 4}} \right\}\)
C.a) \(S = \left\{ {{7 \over 2};{4 \over 5}} \right\}\)
b) \(S = \left\{ {{4 \over 3};{5 \over 4}} \right\}\)
D.a) \(S = \left\{ {{5 \over 2};{4 \over 3}} \right\}\)
b) \(S = \left\{ {{5 \over 3};{3 \over 4}} \right\}\)
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Hóa Học lớp 12
