Calcule as seguintes multiplicações:

a) (6+4i) (2+3i) =
b) (5+6i) (5+6i) =
c) (7+8i)²

A. 26i

B. 36i^2 + 60x + 25

C. 64x^2 + 112x + 49

Step-by-step explanation:

To get answer in question A, B, and C, use FOIL method

FOIL Method:

(pretend x is i)

Question A:

Question B:

Question C

people grow faster than other people.

step-by-step explanation:

should you really be posting this isn't math boi.

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: