Question

Solve 2x2 + x + 7 = 0. Round solutions to the nearest hundredth.

x ≈ −4.21 and x ≈ 3.21

x ≈ −2.10 and x ≈ 1.60

x ≈ −1.60 and x ≈ 2.10

No real solutions

Answer 1

2x^2 + x + 7 = 0

Just use the quadratic equation
x = ( -b +- sqrt(b^2-4ac))/2a
x = ( -1 += sqrt(-1 - 4*2*7))/4

at this point you can stop because the sqrt is of a negative value meaning there are no real solutions.

Answer 2

hope i help

Answer 3

yes u did, can u do another ?

Answer 4

sure

Answer 5

Identify the vertex for the graph of y = −2x2 − 12x + 1.

(−3, 19)

(−3, 55)

(3, −53)

(3, −47)

Answer 6

ok

Answer 7

oo this is easy i did this one

Answer 8

y=−2x2−12x+1.
0 = -2*X^2-12*X+1
Axis of symmetry: X= -3; Vertex (maximum): ( -3,19)
Quadratic formula: X = (-b ±√(b²-4ac))/(2a) = (12±√(144 +8))/( -4)
positive discriminant = 152; two real roots: 0.08220700148448801 and -6.082207001484488
factors: (-2X -12.1644)(X -0.0822)

hope it help's

Answer 9

ok which choice would it be ?

Answer 10

@blackprincesssen