Set each set of parentheses to 0 and solve for x.
X—6 = 0
X = 6
X + 5 = 0
X = -5
X-9 = 0
X = 9
The zeros are 6, -5, 9
1) the answer to the radical is x^3+6x^2+12x+ 8
2) simplify this : x^3+6x^2+12x+ 8 + 3 = 27, into
3) this : x^3+6x^2+12x+ 11 = 27
4)Subtract 27 from both sides
x^3+6x^2+12x -16= 0
5) Use cubic formula.
x = 0.884499
17. Sample answer: the elevation is the product of the rate and the time
18. $227.50; sample answer: $45.50 ≈ $50, and $50 × 5 = $250,
which is close to $227.50.
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4x + y = 12
Get y by itself
Subtract 4x
y = -4x + 12
Since you know what y is, you can plug the value into the second equation
6x + 2(-4x + 12) = 18
6x - 8x + 24 = 18
-2x = -6
x = 3
Plug the value 3 into x for y = -4x + 12 in order to find y
-4(3) + 12 = y, y = 0
Solution: x = 3, y = 0