(7 + 5i) - ( -9 + i)
= 7 + 5i - (-9) - (i)
= 7 + 5i + 9 - i
= 16 + 4i
= 4i + 16
Question 5 - A
Question 6 - B
Answer:
x = StartFraction negative 5 plus or minus StartRoot 5 EndRoot Over 2 EndFraction
Step-by-step explanation:
we know that
The formula to solve a quadratic equation of the form
is equal to
in this problem we have
equate the function to zero
so
substitute in the formula
therefore
x = StartFraction negative 5 plus or minus StartRoot 5 EndRoot Over 2 EndFraction
Rewritten:
15w^9 - 10w^7 + 12w - 7
Leading coefficient: 15
Degree of the polynomial: 9
Subtraction property or the division property