3/4x2²+1/4x(-2)² Nhờ làm câu này:)

2 câu trả lời

`3/4 . 2^2+1/4 . (-2)^2`

`= 3/4 . 4 + 1/4 . 4`

`= 4 . ( 3/4 + 1/4 )`

`= 4 . 4/4`

`= 4 . 1`

`= 4`

$\dfrac{3}{4}\cdot \:2^2+\dfrac{1}{4}\left(-2\right)^2$

$=\dfrac{3}{4}\cdot \:4+\dfrac{1}{4}\left(-2\right)^2$

$=\dfrac{3}{4}\cdot \:4+\dfrac{1}{4}\cdot \:4$

$=3+\dfrac{1}{4}\cdot \:4$

$=3+1$

$=4$