What is (-8-3i)-(-21-7i) ?

The solution to (-8-3i)-(-21-7i) is 13+4i

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simplify (-8-3i)-(-21-7i)

simplify

(- 8 - 3 i) - (- 21 - 7 i)

13 + 4 i

Solution steps

(- 8 - 3 i) - (- 21 - 7 i)

Group the real part and the imaginary part of the complex number

(a + bi) - (c + d i) = (a - c) + (b - d) i

= (- 8 - (- 21)) + (- 3 - (- 7)) i

Simplify

(- 8 - (- 21)) + (- 3 - (- 7)) i : 13 + 4 i

= 13 + 4 i

(3 x + 2) + (3 - 5 x)

(4 y - 5)^{2}

- 2 (x^{2})

6 x^{2} + 10 x

(n - \frac{2}{7})^{3}