सोडोवचें (a^{2}+1/2ab-2/5b^{2})-(b^2-3/7a^2+2ab)+(7/5b^2+frac{3}{2}ab-frac{10}{7}a^2)=

$$( a ^ { 2 } + \frac { 1 } { 2 } a b - \frac { 2 } { 5 } b ^ { 2 } ) - ( b ^ { 2 } - \frac { 3 } { 7 } a ^ { 2 } + 2 a b ) + ( \frac { 7 } { 5 } b ^ { 2 } + \frac { 3 } { 2 } a b - \frac { 10 } { 7 } a ^ { 2 } ) =$$

मूल्यांकन करचें

$$0$$

सोडोवणी पांवडे

b^{2}-\frac{3}{7}a^{2}+2ab चो विरोधी सोदूंक, दरेक सज्ञेचो विरोधी सोदचो.

$$a^{2}+\frac{1}{2}ab-\frac{2}{5}b^{2}-b^{2}+\frac{3}{7}a^{2}-2ab+\frac{7}{5}b^{2}+\frac{3}{2}ab-\frac{10}{7}a^{2}$$

-\frac{7}{5}b^{2} मेळोवंक -\frac{2}{5}b^{2} आनी -b^{2} एकठांय करचें.

$$a^{2}+\frac{1}{2}ab-\frac{7}{5}b^{2}+\frac{3}{7}a^{2}-2ab+\frac{7}{5}b^{2}+\frac{3}{2}ab-\frac{10}{7}a^{2}$$

\frac{10}{7}a^{2} मेळोवंक a^{2} आनी \frac{3}{7}a^{2} एकठांय करचें.

$$\frac{10}{7}a^{2}+\frac{1}{2}ab-\frac{7}{5}b^{2}-2ab+\frac{7}{5}b^{2}+\frac{3}{2}ab-\frac{10}{7}a^{2}$$

-\frac{3}{2}ab मेळोवंक \frac{1}{2}ab आनी -2ab एकठांय करचें.

$$\frac{10}{7}a^{2}-\frac{3}{2}ab-\frac{7}{5}b^{2}+\frac{7}{5}b^{2}+\frac{3}{2}ab-\frac{10}{7}a^{2}$$

0 मेळोवंक -\frac{7}{5}b^{2} आनी \frac{7}{5}b^{2} एकठांय करचें.

$$\frac{10}{7}a^{2}-\frac{3}{2}ab+\frac{3}{2}ab-\frac{10}{7}a^{2}$$

0 मेळोवंक -\frac{3}{2}ab आनी \frac{3}{2}ab एकठांय करचें.

$$\frac{10}{7}a^{2}-\frac{10}{7}a^{2}$$

0 मेळोवंक \frac{10}{7}a^{2} आनी -\frac{10}{7}a^{2} एकठांय करचें.

$$0$$

गुणकपद

$$0$$

सोडोवणी पांवडे

\frac{1}{70} गुणकपद काडचें.

$$\frac{70a^{2}+35ab-28b^{2}-10\left(7b^{2}-3a^{2}+14ab\right)+98b^{2}+105ab-100a^{2}}{70}$$

सोंपें करचें.

$$0$$