Toán Lớp 8: Rút gọn biểu thức sau:
x(x-14)-10(x-1)^2
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Toán Lớp 8: Rút gọn biểu thức sau:
x(x-14)-10(x-1)^2
Comments ( 2 )
$=x^2-14x-10(x^2-2x.1+1)$
$=x^2-14x-10x^2+20x-10$
$=-9x^2+6x-10$