Solve 3/4(2-5i)+1/2(3+1/2i)?

$$\frac { 3 } { 4 } ( 2 - 5 i ) + \frac { 1 } { 2 } ( 3 + \frac { 1 } { 2 } i ) ?$$

Evaluate

$$3-\frac{7}{2}i=3-3.5i$$

Solution Steps

Multiply \frac{3}{4} times 2-5i.

$$\frac{3}{4}\times 2+\frac{3}{4}\times \left(-5i\right)+\frac{1}{2}\left(3+\frac{1}{2}i\right)$$

Do the multiplications in \frac{3}{4}\times 2+\frac{3}{4}\times \left(-5i\right).

$$\frac{3}{2}-\frac{15}{4}i+\frac{1}{2}\left(3+\frac{1}{2}i\right)$$

Multiply \frac{1}{2} times 3+\frac{1}{2}i.

$$\frac{3}{2}-\frac{15}{4}i+\frac{1}{2}\times 3+\frac{1}{2}\times \left(\frac{1}{2}i\right)$$

Do the multiplications in \frac{1}{2}\times 3+\frac{1}{2}\times \left(\frac{1}{2}i\right).

$$\frac{3}{2}-\frac{15}{4}i+\left(\frac{3}{2}+\frac{1}{4}i\right)$$

Combine the real and imaginary parts.

$$\frac{3}{2}+\frac{3}{2}+\left(-\frac{15}{4}+\frac{1}{4}\right)i$$

Do the additions.

$$3-\frac{7}{2}i$$

Real Part

$$3$$

Solution Steps

Multiply \frac{3}{4} times 2-5i.

$$Re(\frac{3}{4}\times 2+\frac{3}{4}\times \left(-5i\right)+\frac{1}{2}\left(3+\frac{1}{2}i\right))$$

Do the multiplications in \frac{3}{4}\times 2+\frac{3}{4}\times \left(-5i\right).

$$Re(\frac{3}{2}-\frac{15}{4}i+\frac{1}{2}\left(3+\frac{1}{2}i\right))$$

Multiply \frac{1}{2} times 3+\frac{1}{2}i.

$$Re(\frac{3}{2}-\frac{15}{4}i+\frac{1}{2}\times 3+\frac{1}{2}\times \left(\frac{1}{2}i\right))$$

Do the multiplications in \frac{1}{2}\times 3+\frac{1}{2}\times \left(\frac{1}{2}i\right).

$$Re(\frac{3}{2}-\frac{15}{4}i+\left(\frac{3}{2}+\frac{1}{4}i\right))$$

Combine the real and imaginary parts in \frac{3}{2}-\frac{15}{4}i+\frac{3}{2}+\frac{1}{4}i.

$$Re(\frac{3}{2}+\frac{3}{2}+\left(-\frac{15}{4}+\frac{1}{4}\right)i)$$

Do the additions in \frac{3}{2}+\frac{3}{2}+\left(-\frac{15}{4}+\frac{1}{4}\right)i.

$$Re(3-\frac{7}{2}i)$$

The real part of 3-\frac{7}{2}i is 3.

$$3$$