Given that a polynomial function P(x) has rational coefficients.
Two roots are already given which are i and 7+8i,
Now we have to find two additional roots of P(x)=0
Given roots i and 7+8i are complex roots and we know that complex roots always occur in conjugate pairs so that means conjugate of given roots will also be the roots.
conjugate of a+bi is given by a-bi
So using that logic, conjugate of i is i
also conjugate of 7+8i is 7-8i
Hence final answer for the remaining roots are (-i) and (7-8i).
Rent and electricity = 5x + 11
rent = 2x - 3
electricity = (5x + 11) - (2x - 3)
electricity = 5x + 11 - 2x + 3
electricity = 3x + 14
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Answer: 3x + 11
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Answer:
In total there are 25 students in the class.
Answer:
X^2 + 5x + 6
Step-by-step explanation:
(X times X) + (x times 2) + (x times 3) + ( 3 times 2)
X^2 + (2x) + (3x) + 6
combind like terms
X^2 + 5x + 6
