Toán Lớp 8: Thực hiện phép tính:
(2x+3).(3x-1)-6x²
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Toán Lớp 8: Thực hiện phép tính:
(2x+3).(3x-1)-6x²
Comments ( 1 )
=2x(3x-1)+3.(3x-1)-6x^2
=6x^2-2x+9x-3-6x^2
=(6x^2-6x^2)+(9x-2x)-3
=7x-3