Answer:
K What's the problem?
Step-by-step explanation:
I think Its 6.............
Answer:
x = 4 and y = - 5
Step-by-step explanation:
note that the product of a complex number and it's conjugate is real
That is
(a + bi)(a - bi) where a, b are real
= a² - abi + abi - b²i²
= a² + b² ← a real number
For (4 + 5i)(x + yi) to be real
we require (x + yi) to be the conjugate of 4 + 5i , that is 4 - 5i
(4 + 5i)(4 - 5i) ⇒ x = 4 and y = - 5
Answer:
2x(3x−2)
Step-by-step explanation:
Factor 
− 4x
− 4x
=2x(3x−2)
Hope this helps!
The answer is 30.
8 x 5 =40
40 - 10 = 30
