展开 (4x^2+5y^2)i+4xyj

解答

展开

(4 x^{2} + 5 y^{2}) i + 4 x y j

4 j x y + (4 x^{2} + 5 y^{2}) i

求解步骤

(4 x^{2} + 5 y^{2}) i + 4 x y j

= i (4 x^{2} + 5 y^{2}) + 4 j x y

展开

i (4 x^{2} + 5 y^{2}) : 4 x^{2} i + 5 i y^{2}

= 4 x^{2} i + 5 i y^{2} + 4 j x y

Rewrite in standard complex form:

4 j x y + (4 x^{2} + 5 y^{2}) i

= 4 j x y + (4 x^{2} + 5 y^{2}) i

e x p an d (2, 3) (- 3, 1) y (- 1, - 3)

e x p an d x \cdot y^{2} - (x^{3} + y^{3}) d x

e x p an d (t^{2} + b t + c) (t^{2} + d t + e)

e x p an d \frac{200}{s ( s ^{3} + 6 s ^{2} + 11 s + 6 )}

e x p an d \frac{s + 10}{( s + 2 ) ( s ^{2} + 6 s + 25 )}