Datrys (frac{2*5-sqrt{400}}{2})-{-[3(3+1)]}

$$( \frac { 2 \times 5 - \sqrt { 400 } } { 2 } ) - \{ - [ 3 ( 3 + 1 ) ] \}$$

Enrhifo

$$7$$

Camau Ateb

Lluosi 2 a 5 i gael 10.

$$\frac{10-\sqrt{400}}{2}-\left(-3\left(3+1\right)\right)$$

Cyfrifo ail isradd 400 a chael 20.

$$\frac{10-20}{2}-\left(-3\left(3+1\right)\right)$$

Tynnu 20 o 10 i gael -10.

$$\frac{-10}{2}-\left(-3\left(3+1\right)\right)$$

Rhannu -10 â 2 i gael -5.

$$-5-\left(-3\left(3+1\right)\right)$$

Adio 3 a 1 i gael 4.

$$-5-\left(-3\times 4\right)$$

Lluosi 3 a 4 i gael 12.

$$-5-\left(-12\right)$$

Gwrthwyneb -12 yw 12.

$$-5+12$$

Adio -5 a 12 i gael 7.

$$7$$

Ffactor

$$7$$