1.) Solve for x. 2x(x - 12) = -40

Question

2.) Solve for x. 3x2 + 2x = 12 - 7x

3.) Simplify the expression. 8sqrt[-63]

4.) Find the absolute value of the complex number. Abs Val [7 + 24i]

5.) Simplify the expression. [4 - 7i] + [2 + 3i]

Thank you so much!! :)

Answer 1

1)
2x^2 -24 x + 40 = 0
x^2 - 12 x + 20 = 0
(x-2)(x-10) = 0
x = 2
or
x = 10

Answer 2

3x2 + 2x = 12 - 7x

3 x^2 + 9 x - 12 = 0

x^2 + 3 x - 4 = 0

(x+4)(x-1) = 0
x = 1
or
x = -4

Answer 3

8sqrt[-63]
not much I can do but put an i in
8 i sqrt 63

Answer 4

7 + 24i

r = sqrt (49 + 576) = 25

Answer 5

[4 - 7i] + [2 + 3i]
just add
6 -4i