Answer:
(146 + 0i)
Step-by-step explanation:
(11+5i)(11-5i)
The formula is :
(a+bi) • (x+yi) = ax+by•i^2+(ay+bx)i
and since i^2 = -1 it can be written as :
ax - by + (ay + bx) i
( 11 + 5i) • ( 11 - 5i) =
hope this helped brainlest owo???
146
(11 + 5i)(11 - 5i) =
Use the product of a sum and a difference, (a + b)(a - b) = a^2 - b^2.
= 11^2 - (5i)^2
= 121 - (25)(i^2)
= 121 - (25)(-1)
= 121 - (-25)
= 121 + 25
= 146
