In the following figure ABC~XYZ. Based on the given information find AC.

A) 18cm
B) 14cm
C) 10cm
D) 7cm

A.18cm

Step-by-step explanation:

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P(x) = x³-2ix² - 49x + 98i

Step-by-step explanation:

If the roots of the polynomial P(x) are -7, 2i and 7 then the factors of the polynomial in x is expressed are respectively (x+7), x-2i and x-7

Multiplying the factors together to get the required polynomial function:

P(x) = (x+7)(x-7)(x-2i)

P(x) = (x²-7x+7x-49)(x-2i)

P(x) = (x²-49)(x-2i)

P(x) = x²(x)-x²(2i) - 49x -49(-2i)

P(x) = x³-2ix² - 49x + 98i

Hence the polynomial function with degree 3 is P(x) = x³-2ix² - 49x + 98i