Please help me so confused Solve. x^2 + 3x − 7 = 0 Enter your answers, as exact values, in the boxes. x = or x =
2 answers:
Answer:
x = -1/2 ( 3±sqrt(37))
Step-by-step explanation:
x^2 + 3x − 7 = 0
Add 7 to each side
x^2 + 3x =7
Using complete the square
Taking the coefficient of x
3
Divide by 2
3/2
Square it
(3/2)^2 = 9/4
Add this to each side
x^2 + 3x+ 9/4 = 7+9/4
( x+ 3/2) ^2 = 28/4 + 9/4
( x+ 3/2) ^2 = 37/4
Take the square root of each side
x+3/2 = ±sqrt(37/4)
x+3/2 = ±sqrt(37) / sqrt(4)
x+ 3/2 = ±sqrt(37) / 2
Subtract 3/2 from each side
x = -3/2 ±sqrt(37) / 2
x = -1/2 ( 3±sqrt(37))
Answer:
-1.5 -√9.25 or -1.5 +√9.25
Step-by-step explanation:
x^2 + 3x - 7 = 0
This will not factor so we can use completing the square:
x^2 + 3x = 7
(x + 1.5)^2 - 2.25 = 7
(x + 1.5)^2 = 9.25
x + 1.5 = ±√9.25
x = -1.5 ±√9.25
You might be interested in
The answer is B) it shifts up and to the right
-77 PEMDAS is the process you would use and you would have to do the associative property with-(3--4)
V(18-1811) también eres el mejor en la vida y tú me ganas de comer
Answer:
y=4x + 3/4
Step-by-step explanation:
2•10+5•3
10•3
35/30*5 ( do it on both sides )
you'll get 7/6 or 1 1/6