Answer:
(y+1)
Step-by-step explanation:
use quadratic formula.
you will get two values of y
y= 7/5 and y= -1
u can create factors using these values of y (making 0 subject)
like
for 7/5
7/5=y
7=5y
5y-7=0
zero becomes subject in such cases bcz there are no numbers left on that side
now for -1
-1=y
y+1=0
so your factors are 5y-7 and y+1
Answer:
10
Step-by-step explanation:
32-b=3b-8
32+8=3b+b
40=4b
b=10
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
(6.0 x 10^5) x (3.0 x 10^4) = (6 x 3) x 10^(5 + 4) = 18 x 10^9 = 1.8 x 10^10
