Datrys 05(sqrt{y^2+10}+y)(sqrt{y^2+10}+y)-2

$$05( \sqrt{ { y }^{ 2 } +10 } +y)( \sqrt{ { y }^{ 2 } +10 } +y)-2$$

Enrhifo

$$-2$$

Camau Ateb

Lluosi \sqrt{y^{2}+10}+y a \sqrt{y^{2}+10}+y i gael \left(\sqrt{y^{2}+10}+y\right)^{2}.

$$0\times 5\left(\sqrt{y^{2}+10}+y\right)^{2}-2$$

Lluosi 0 a 5 i gael 0.

$$0\left(\sqrt{y^{2}+10}+y\right)^{2}-2$$

Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(\sqrt{y^{2}+10}+y\right)^{2}.

$$0\left(\left(\sqrt{y^{2}+10}\right)^{2}+2\sqrt{y^{2}+10}y+y^{2}\right)-2$$

Cyfrifo \sqrt{y^{2}+10} i bŵer 2 a chael y^{2}+10.

$$0\left(y^{2}+10+2\sqrt{y^{2}+10}y+y^{2}\right)-2$$

Cyfuno y^{2} a y^{2} i gael 2y^{2}.

$$0\left(2y^{2}+10+2\sqrt{y^{2}+10}y\right)-2$$

Defnyddio’r briodwedd ddosbarthu i luosi 0 â 2y^{2}+10+2\sqrt{y^{2}+10}y a chyfuno termau tebyg.

$$3\times 0-2$$

Lluosi 3 a 0 i gael 0.

$$0-2$$

Tynnu 2 o 0 i gael -2.

$$-2$$

Ffactor

$$-2$$