Toán Lớp 8: Tìm x, biết: 2x(x – 5) – x(3 + 2x) = 26.
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Toán Lớp 8: Tìm x, biết: 2x(x – 5) – x(3 + 2x) = 26.
giúp mình với
Comments ( 2 )
<=>$2x^{2}-10x$ $-3x-$ $2x^{2}=26$
<=> $-13x =26$
=> $x=-2$