Which is zero of the polynomial expression 7x+21
2 answers:
The expression will have a zero when it’s equation is equal to zero:
7x+21=0
Now solve for x, start by isolating the variable (x) by subtracting 21 from both sides
7x = -21
The only thing stopping c from being by itself is 7, so we divide both sides by 7 to isolate x
x = -3
Answer:
The zero is x = -3
- Use the Rational Zero Theorem to list all possible rational zeros of the function.
- Use synthetic division to evaluate a given possible zero by synthetically dividing the candidate into the polynomial.
- Repeat step two using the quotient found with synthetic division.
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