Datrys (4a^{2}+b^2+a-5c+7)+(c^2-5+a-3b^2-6a^2)

$$( 4 a ^ { 2 } + b ^ { 2 } + a - 5 c + 7 ) + ( c ^ { 2 } - 5 + a - 3 b ^ { 2 } - 6 a ^ { 2 } )$$

Enrhifo

$$2-5c+c^{2}-2b^{2}+2a-2a^{2}$$

Camau Ateb

Tynnu 5 o 7 i gael 2.

$$4a^{2}+b^{2}+a-5c+2+c^{2}+a-3b^{2}-6a^{2}$$

Cyfuno a a a i gael 2a.

$$4a^{2}+b^{2}+2a-5c+2+c^{2}-3b^{2}-6a^{2}$$

Cyfuno b^{2} a -3b^{2} i gael -2b^{2}.

$$4a^{2}-2b^{2}+2a-5c+2+c^{2}-6a^{2}$$

Cyfuno 4a^{2} a -6a^{2} i gael -2a^{2}.

$$-2a^{2}-2b^{2}+2a-5c+2+c^{2}$$

Gwahaniaethu w.r.t. a

$$2-4a$$