Question

What are the approximate solutions of 4x2 + 3 = -12x to the nearest hundredth?

Answer 1

i give medals

Answer 2

here are the options
x ≈ -3.23 and x ≈ 0.23
x ≈ -2.72 and x ≈ -0.28
x ≈ 0.28 and x ≈ 2.72
x ≈ -0.23 and x ≈ 3.23

Answer 3

It is a quadratic equation.
4x^2 + 3 = -12x
4x^2 + 12x + 3 = 0

Use the quadratic formula: { -b +/- sqrt(b^2 - 4ac) } / 2a

Answer 4

so it would be x=2.72 and x=1.40??

Answer 5

I am getting x = -2.72 and x = -0.28

Answer 6

show me how you got that ??

Answer 7

solve for x

Answer 8

can you show me how to solve for x?

Answer 9

4x^2 + 12x + 3 = 0
x = { -12 +/- sqrt( 12^2 - 4*4*3 ) } / (2*4)
x = { -12 +/- sqrt(144-48) } / 8
x = { -12 +/- sqrt(96) } / 8
x = { -12 +/- 9.8 } / 8
x = (-12 + 9.8) / 8 or (-12 - 9.8) / 8
= -2.2/8 or -21.8 / 8
x = -0.28 or -2.72