Multiply (6 – 7i)(3 – 6i). a. 18 – 57i 42i2 b. 18 42i2 c. 60 – 57i d. –24 – 57i
2 answers:
Answer: The correct option is
(d)
Step-by-step explanation: We are given to multiply the following two complex numbers :
To multiply the given complex numbers, we need to multiply the real and imaginary parts of one complex number number with the real and imaginary parts of the other.
The multiplication is as follows :
Thus, the required multiplied form is
Option (d) is CORRECT.
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Answer:
Step-by-step explanation:
From inspection, the curve has 3 turning/stationary points, which suggests it is quartic function. In factored form: ax(x + b)(x + c)(x + d)
From inspection, there are 3 roots at:
Therefore x, (x + 2) and (x - 1) will be factors.
Whenever a turning/stationary point touches the x-axis, we conclude that a root is repeated at that point. Therefore, from inspection, root x = 1 is a repeated root. So x, (x + 2) and (x - 1)² are factors.
The quartic curve is a "n" shape, which means the leading coefficient is negative. We are told the leading coefficient is + or - 1. Therefore, it will be -1.
Therefore, an equation for the function in factored form is: