What is (5-2i)(2+7i)-2i(3i)^2 ?

The solution to (5-2i)(2+7i)-2i(3i)^2 is 24+49i

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simplify (5-2i)(2+7i)-2i(3i)^2

simplify

(5 - 2 i) (2 + 7 i) - 2 i (3 i)^{2}

24 + 49 i

Solution steps

(5 - 2 i) (2 + 7 i) - 2 i (3 i)^{2}

(5 - 2 i) (2 + 7 i) = 24 + 31 i

2 i (3 i)^{2} = - 18 i

= 24 + 31 i - (- 18 i)

Apply rule:

a - (- b) = a + b

31 i - (- 18 i) = 31 i + 18 i

= 24 + 31 i + 18 i

Add similar elements:

31 i + 18 i = 49 i

= 24 + 49 i

0.72 x = 252

20 x^{8} y^{2} z^{2} + 15 x^{5} y^{2} z + 35 x^{3} y^{3} z

2 (x - 2) = 2 (x - 2)

\frac{- 3}{4 ^{2}}

\frac{1}{2} x^{2} + 18 = 0