Answer:
x = 2 ±
Step-by-step explanation:
Given
y = x² - 4x - 9
To find the zeros, set y = 0, that is
x² - 4x - 9 = 0 ( add 9 to both sides )
x² - 4x = 9
To complete the square
add ( half the coefficient of the x- term)² to both sides
x² + 2(- 2)x + 4 = 9 + 4, that is
(x - 2)² = 13 ( take the square root of both sides )
x - 2 = ± ( add 2 to both sides )
x = 2 ± ← exact solutions
Answer:
x= -16
Step-by-step explanation:
-16 - (-16)= -16 + 16 =0
Answer:
1256
Step-by-step explanation:
Just multiply and add each number
Step-by-step explanation:
multiply the outer term to the inner term
so, 6x-10.
Answer:
um i would say C, im not really sure tho. Not my area of expertise
Step-by-step explanation: