Answeer
4/3
Step-by-step explanation:
STEP
1
:
Equation at the end of step 1
(((3 • (x3)) - 13x2) + 18x) - 8 = 0
STEP
2
:
Equation at the end of step
2
:
((3x3 - 13x2) + 18x) - 8 = 0
STEP
3
:
Checking for a perfect cube
3.1 3x3-13x2+18x-8 is not a perfect cube
Answer:
6
Step-by-step explanation:
P=2(L+W)
74=2(31+W)
74=62+2W
2W=74-62
W=12/2
W=6
Answer:
x = - 10, x = - 2
Step-by-step explanation:
Given
x² + 12x = - 20
To complete the square
add (half the coefficient of the x- term )² to both sides
x² + 2(6)x + 6² = - 20 + 6² ← completing the square
(x + 6)² = - 20 + 36 = 16
Take the square root of both sides
x + 6 = ± = ± 4
Subtract 6 from both sides
x = - 6 ± 4, hence
x = - 6 - 4 = - 10 or x = - 6 + 4 = - 2