What is (7-i)+(-9+8i) ?

The solution to (7-i)+(-9+8i) is -2+7i

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simplify (7-i)+(-9+8i)

simplify

(7 - i) + (- 9 + 8 i)

- 2 + 7 i

Solution steps

(7 - i) + (- 9 + 8 i)

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

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

= (7 - 9) + (- 1 + 8) i

Simplify

(7 - 9) + (- 1 + 8) i : - 2 + 7 i

= - 2 + 7 i

\frac{8}{4 - i}

\frac{s ^{2} - 81}{s ^{2} - 18 s + 81}

\frac{1}{9} \times 2

- 4 x^{2} + 12 x - 8

16 x y^{2}