Answer:
x = - 4 ± 2
Step-by-step explanation:
Given
f(x) = x² + 8x + 4
To find the zeros let f(x) = 0, that is
x² + 8x + 4 = 0 ( subtract 4 from both sides )
x² + 8x = - 4
To solve using the method of completing the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(4)x + 16 = - 4 + 16
(x + 4)² = 12 ( take the square root of both sides )
x + 4 = ± = ± 2 ( subtract 4 from both sides )
x = - 4 ± 2
Thus the zeros are
x = - 4 - 2 and x = - 4 + 2
Lou has 800 pennies
Joe has 8 pennies
Therefore they have 808 pennies
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Answer:
x = -7/12.
Step-by-step explanation:
Given:
Create a common denominator for each term:
Disregard the denominator:
12x + 5 = -2
Subtract 5 from both sides:
12x = -7
Divide both sides by 12:
x = -7/12.
Answer:
110
Step-by-step explanation:
i think if its wrong im sorry
(7.5-3.5)/(4.5-2.5)= 4/2= 2
y - 7.5 = 2(x - 4.5): the answer
To complete: y - 7.5 = 2x - 9
y = 2x - 1.5