Toán Lớp 8: Cho a+b = 25, ab= 136 Tính A= a^2 + b^2 B= a^3 + b^3 C= a^4 + b^4 -

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Toán Lớp 8: Cho a+b = 25, ab= 136 Tính A= a^2 + b^2 B= a^3 + b^3 C= a^4 + b^4