Wiki User
∙ 14y ago28x^2 - 47x = 15
28x^2 - 47x - 15 = 0
ax^2 + bx +c = 0,
so:
a = 28
b = -47
c = -15
quadratic formula:
[-b^2 + sqrt(4*a*c)] / 2*a AND
[-b^2 - sqrt(4*a*c)] / 2*a
[47^2 + sqrt(4*28*-15)] / 2*28 AND
[47^2 - sqrt(4*28*-15)] / 2*28
then just do the math
Wiki User
∙ 14y agoSolve using the quadratic formula
-2x2 + 9x - 12 = 0Then apply the quadratic formula.
Using the quadratic equation formula:- x = 3.795831523 or x = -5.795831523
If you can't factor it easily, use the quadratic formula.
The Quadratic formula in mathematics is used to solve quadratic equations in algebra. The simplest way to solve these equations is to set each of the factors to zero and then solve each factor separately.
Solve using the quadratic formula
Quadratic equation formula
Using the quadratic equation formula:- x = 3.795831523 or x = -5.795831523
-2x2 + 9x - 12 = 0Then apply the quadratic formula.
The quadratic formula is used to solve the quadratic equation. Many equations in which the variable is squared can be written as a quadratic equation, and then solved with the quadratic formula.
If you can't factor it easily, use the quadratic formula.
If you can't factor it easily, use the quadratic formula.
I suggest you use the quadratic formula. In this case, a = 1, b = 5, c = 3.
The Quadratic formula in mathematics is used to solve quadratic equations in algebra. The simplest way to solve these equations is to set each of the factors to zero and then solve each factor separately.
It can be solved by using the quadratic equation formula.
X= (3/5 , -2)
a2+30a+56=0 , solve for a Using the quadratic formula, you will find that: a=-2 , a=-28