can someone help me with these math problems?
Simplify and express in a+bi form
5. 2i^74+5i^105
b. (3+i)^2 (1-i)^2
c. i/20+i
solve the equation and express the solution in the form a+bi
6. 4x^2+x+3
b. x^4-16=0
Solve the equation
7. x^4+7x^2-18=0
Solve the inequality in its interval form
8. / 2x-3/ -4< or = 3 b. x(x-1)^2 (x^2+1)( x-4)>0
Top 2 Answers
Favorite Answer
PROBLEM 5B:
(3+i)^2 (1-i)^2 = (9+6i+i^2)(1-2i+i^2)=
….9-18i+9i^2 +6i-12i^2 +6i^3 + i^2 -2i^3 + i^4
= i^4 + 4i^3 -2i^2 -12i +9
PROBLEM 5C:
i/20 + i = i/20 + 20i/20 = 21i/20
PROBLEM 6B:
x^4 – 16 = 0
(x^2 + 4)(x^2 – 4) = 0
x^2 = -4 and x^2 = 4
x = 2i, -2i, +2, -2
PROBLEM 7:
x^4 + 7x^2 – 18 = 0
(x^2 + 9)(x^2 – 2) = 0
x^2 = -9 and x^2 = 2
x = 3i, -3i, POS sqrt 2 and NEG sqrt 2
0
isn’t that cheating??
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