Answer:
x ≈ - 5.32, x ≈ 1.32
Step-by-step explanation:
Given
x² + 4x - 7 = 0 ( add 7 to both sides )
x² + 4x = 7
To complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(2)x + 4 = 7 + 4
(x + 2)² = 11 ( take the square root of both sides )
x + 2 = ± ( subtract 2 from both sides )
x = - 2 ±
Thus
x = - 2 - ≈ - 5.32 ( to 2 dec. places )
x = - 2 + ≈ 1.32 ( to 2 dec. places )
try this for answer (11×3.5)-9=x
Answer:
I think it is 4 to 3
Step-by-step explanation:
if I am wrong I'm sorry
Answer:
Ask brainly :)
Step-by-step explanation:
The question is cut off, but here are the formulas for area and circumference:
A = pi * r^2
C = 2 * pi * r