Solve 21.2x+3y/2^2+y^2=9

$$\frac { 21.2 x + 3 y } { 2 ^ { 2 } + y ^ { 2 } } = 9$$

Solve for x (complex solution)

$$x=\frac{45y^{2}}{106}-\frac{15y}{106}+\frac{90}{53}$$

$$y\neq -2i\text{ and }y\neq 2i$$

Steps for Solving Linear Equation

Multiply both sides of the equation by \left(y-2i\right)\left(y+2i\right).

$$21.2x+3y=9\left(y-2i\right)\left(y+2i\right)$$

Use the distributive property to multiply 9 by y-2i.

$$21.2x+3y=\left(9y-18i\right)\left(y+2i\right)$$

Use the distributive property to multiply 9y-18i by y+2i and combine like terms.

$$21.2x+3y=9y^{2}+36$$

Subtract 3y from both sides.

$$21.2x=9y^{2}+36-3y$$

The equation is in standard form.

$$21.2x=9y^{2}-3y+36$$

Divide both sides of the equation by 21.2, which is the same as multiplying both sides by the reciprocal of the fraction.

$$\frac{21.2x}{21.2}=\frac{9y^{2}-3y+36}{21.2}$$

Dividing by 21.2 undoes the multiplication by 21.2.

$$x=\frac{9y^{2}-3y+36}{21.2}$$

Divide 9y^{2}+36-3y by 21.2 by multiplying 9y^{2}+36-3y by the reciprocal of 21.2.

$$x=\frac{45y^{2}}{106}-\frac{15y}{106}+\frac{90}{53}$$

Solve for x

$$x=\frac{45y^{2}}{106}-\frac{15y}{106}+\frac{90}{53}$$

Steps for Solving Linear Equation

Multiply both sides of the equation by y^{2}+4.

$$21.2x+3y=9\left(y^{2}+4\right)$$

Use the distributive property to multiply 9 by y^{2}+4.

$$21.2x+3y=9y^{2}+36$$

Subtract 3y from both sides.

$$21.2x=9y^{2}+36-3y$$

The equation is in standard form.

$$21.2x=9y^{2}-3y+36$$

Divide both sides of the equation by 21.2, which is the same as multiplying both sides by the reciprocal of the fraction.

$$\frac{21.2x}{21.2}=\frac{9y^{2}-3y+36}{21.2}$$

Dividing by 21.2 undoes the multiplication by 21.2.

$$x=\frac{9y^{2}-3y+36}{21.2}$$

Divide 9y^{2}+36-3y by 21.2 by multiplying 9y^{2}+36-3y by the reciprocal of 21.2.

$$x=\frac{45y^{2}}{106}-\frac{15y}{106}+\frac{90}{53}$$

Solve for y (complex solution)

$$\left\{\begin{matrix}\\y=\frac{\sqrt{2120x-3575}}{30}+\frac{1}{6}\text{, }&\text{unconditionally}\\y=-\frac{\sqrt{2120x-3575}}{30}+\frac{1}{6}\text{, }&x\neq \frac{15}{53}i\text{ and }x\neq -\frac{15}{53}i\end{matrix}\right.$$

Solve for y

$$y=\frac{\sqrt{2120x-3575}}{30}+\frac{1}{6}$$

$$y=-\frac{\sqrt{2120x-3575}}{30}+\frac{1}{6}\text{, }x\geq \frac{715}{424}$$