Chọn câu đúng.

$2$

$3$

$4$

$0$

$h\left( x \right) = {x^2} + 5x + 8$

$h\left( x \right) = {x^2} + x$

$h\left( x \right) = {x^2} - x$

$h\left( x \right) = {x^2} - x - 8$

$f\left( x \right) = {x^4} + {x^3} + 3{x^2} + 2x - 4;$ $g\left( x \right) = {x^4} + {x^3} + 4{x^2} + 3x - 4.$

$f\left( x \right) = {x^4} + {x^3} + 2x - 3{x^2} - 4;$ $g\left( x \right) = {x^4} + {x^3} + 3x - 4{x^2} - 4.$

$f\left( x \right) = {x^4} + {x^3} - 3{x^2} + 2x - 4;$ $g\left( x \right) = {x^4} + {x^3} - 4{x^2} + 3x - 4.$           

$f\left( x \right) = {x^4} + {x^3} - 3{x^2} + 2x + 4;$ $g\left( x \right) = {x^4} + {x^3} - 4{x^2} + 3x - 4.$

$f\left( x \right) = {x^4} + {x^3} + 3{x^2} + 2x - 4;$ $g\left( x \right) = {x^4} + {x^3} + 4{x^2} + 3x - 4.$

$f\left( x \right) = {x^4} + {x^3} + 2x - 3{x^2} - 4;$ $g\left( x \right) = {x^4} + {x^3} + 3x - 4{x^2} - 4.$

$f\left( x \right) = {x^4} + {x^3} - 3{x^2} + 2x - 4;$ $g\left( x \right) = {x^4} + {x^3} - 4{x^2} + 3x - 4.$           

$f\left( x \right) = {x^4} + {x^3} - 3{x^2} + 2x + 4;$ $g\left( x \right) = {x^4} + {x^3} - 4{x^2} + 3x - 4.$

$12\,cm$

$13\,cm$

$16\,cm$

$15\,cm$

$DC > AD$

$DC < AD$

$DC = AD$

Không đủ điều kiện so sánh