0
3x2 + 2x - 56 = 0
This is a quadratic equation of the form ax + by + c = 0, where a = 3, b = 2, c = -56.
Use the quadratic formula to solve the equation:
x = [-b ± √(b2 - 4ac)]/2a
x = [-2 ± √[(22 - 4(3)(-56)]]/2(3)
x = [-2 ± √(4 + 672)]/6
x = (-2 ± √676)/6
x = (-2 ± 26)/6
x = (-2 + 26)/6 or x = (-2 - 26)/6
x = 24/6 or x = -28/6
x = 4 or x = -14/3 (as a mixed number, x = - 4 2/3)
Thus, the roots of the equation are x = 4 and x = - 14/3.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
3x plus 56 equals 2x plus 4?
3x+56 = 2x+4 3x-2x = 4-56 x = -52
What is 85 plus 25 minus 56?
85 + 25 - 56 = 54
15 x2 plus 2x-56?
15x2 + 2x - 56 = 15x2 + 30x - 28x - 56 = 15x(x + 2) - 28(x + 2) = (15x - 28)(x + 2)
What is minus 9 times minus 8 plus minus sixteen?
(-9 x -8) + (-16) = (72) -16 = 56
What value of x will make the equation 2x plus 6x equals 56?
x = 7
3x plus 56 equals 2x plus 4?
3x+56 = 2x+4 3x-2x = 4-56 x = -52
What is the center of a circle for the equation 3x2 plus 3y2 - 30x plus 27 equals 0?
56
What is 300 plus 50 minus 56 plus 2306?
30 + 50 - 56 + 2306 = 2330
What is 56 plus 82 minus 9?
56 + 82 - 9 = 129
What is 85 plus 25 minus 56?
85 + 25 - 56 = 54
What is 23 plus 56 minus 4?
23 + 56 - 4 = 75
15 x2 plus 2x-56?
15x2 + 2x - 56 = 15x2 + 30x - 28x - 56 = 15x(x + 2) - 28(x + 2) = (15x - 28)(x + 2)
Factor 14x2-65x plus 56?
(7x - 8)(2x - 7)
What is minus 9 times minus 8 plus minus sixteen?
(-9 x -8) + (-16) = (72) -16 = 56
What is 78 minus 51 plus 46 minus 12 times 34 plus 91 minus 83 plus 10 plus 93 divided by 3 minus 31 plus 56 times 28 minus 49 plus 34 plus 97 times 68-64 plus 33 minus 49 plus 91 times 3 plus 35?
8060 Source: calculator
What is x squared plus 7x minus 56 in factored form?
x2 + 7x - 56 cannot be factorised.
What value of x will make the equation 2x plus 6x equals 56?
x = 7
