Toán Lớp 8: Thực hiện phép tính :
a, x(3x^2-2x+5)
b, (x-4)^2 – ( x-2 )(x-6 )
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Toán Lớp 8: Thực hiện phép tính :
a, x(3x^2-2x+5)
b, (x-4)^2 – ( x-2 )(x-6 )
Comments ( 2 )
=3x^3-2x^2+5x
b, (x-4)^2 – ( x-2 )(x-6 )
=x^2+16-8x-x^2-8x+12
=4