Solve 7m^4/7m+2+3m^2/m+4=

$$\frac { 7 m ^ { 4 } } { 7 m + 2 } + \frac { 3 m ^ { 2 } } { m + 4 } =$$

Evaluate

$$\frac{m^{2}\left(7m^{3}+28m^{2}+21m+6\right)}{\left(m+4\right)\left(7m+2\right)}$$

Short Solution Steps

To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 7m+2 and m+4 is \left(m+4\right)\left(7m+2\right). Multiply \frac{7m^{4}}{7m+2} times \frac{m+4}{m+4}. Multiply \frac{3m^{2}}{m+4} times \frac{7m+2}{7m+2}.

$$\frac{7m^{4}\left(m+4\right)}{\left(m+4\right)\left(7m+2\right)}+\frac{3m^{2}\left(7m+2\right)}{\left(m+4\right)\left(7m+2\right)}$$

Since \frac{7m^{4}\left(m+4\right)}{\left(m+4\right)\left(7m+2\right)} and \frac{3m^{2}\left(7m+2\right)}{\left(m+4\right)\left(7m+2\right)} have the same denominator, add them by adding their numerators.

$$\frac{7m^{4}\left(m+4\right)+3m^{2}\left(7m+2\right)}{\left(m+4\right)\left(7m+2\right)}$$

Do the multiplications in 7m^{4}\left(m+4\right)+3m^{2}\left(7m+2\right).

$$\frac{7m^{5}+28m^{4}+21m^{3}+6m^{2}}{\left(m+4\right)\left(7m+2\right)}$$

Expand \left(m+4\right)\left(7m+2\right).

$$\frac{7m^{5}+28m^{4}+21m^{3}+6m^{2}}{7m^{2}+30m+8}$$

Factor

$$\frac{m^{2}\left(7m^{3}+28m^{2}+21m+6\right)}{\left(m+4\right)\left(7m+2\right)}$$