Solve -u+9u/u+x^2+1+ab+2x^2/x^2

$$- u + \frac { 9 u } { u } + x ^ { 2 } + 1 + a b + \frac { 2 x ^ { 2 } } { x ^ { 2 } }$$

Evaluate

$$x^{2}+ab-u+12$$

Solution Steps

Cancel out u in both numerator and denominator.

$$-u+9+x^{2}+1+ab+\frac{2x^{2}}{x^{2}}$$

Add 9 and 1 to get 10.

$$-u+10+x^{2}+ab+\frac{2x^{2}}{x^{2}}$$

Cancel out x^{2} in both numerator and denominator.

$$-u+10+x^{2}+ab+2$$

Add 10 and 2 to get 12.

$$-u+12+x^{2}+ab$$

Differentiate w.r.t. x

$$2x$$