Q: How do you solve 2x squared - 36x by using a quadratic formula?

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a2+30a+56=0 , solve for a Using the quadratic formula, you will find that: a=-2 , a=-28

using the quadratic formula or the graphics calculator. Yes, you can do it another way, by using a new method, called Diagonal Sum Method, that can quickly and directly give the 2 roots, without having to factor the equation. This method is fast, convenient and is applicable to any quadratic equation in standard form ax^2 +bx + c = 0, whenever it can be factored. It requires fewer permutations than the factoring method does, especially when the constants a, b, and c are large numbers. If this method fails to get answer, then consequently, the quadratic formula must be used to solve the given equation. It is a trial-and-error method, same as the factoring method, that usually takes fewer than 3 trials to solve any quadratic equation. See book titled:" New methods for solving quadratic equations and inequalities" (Trafford Publishing 2009)

Completing the square is one method for solving a quadratic equation. A quadratic equation can also be solved by factoring, using the square roots or quadratic formula. Solving quadratic equations by completing the square will always work when solving quadratic equations-You can also use division or even simply take a GCF, set the quantities( ) equal to zero, and subtract or add to solve for the variable

It is x^2 - 20x + 100 = 0.

This should be solved in two steps. 1) Use the formula for the area of a cube, and solve for the length of a side of the cube. 2) Using this length, it is easy to find out the volume, with the formula for the volume of a cube.

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You can't because it is not a quadratic equation.

Solve using the quadratic formula

It can be solved by using the quadratic equation formula.

If you mean: x squared+9x+14 = 0 then by using the quadratic equation formula x = -2 or x = -7

Using the quadratic equation formula: x = 8.42 or x = -1.42

Unfortunately, the equal sign gets lost in the title. Anyway, you can solve this type of equation using the quadratic formula.

By using the quadratic equation formula

For any quadratic ax2 + bx + c = 0 we can find x by using the quadratic formulae: the quadratic formula is... [-b +- sqrt(b2 - 4(a)(c)) ] / 2a

x2+x-15 = 0 Using the quadratic equation formula: x = 3.405124838 or x = -4.405124838

Using the quadratic formula to solve any quadratic equation is the best way of getting around it because the quadratic formula is "the opposite of b plus or minus the square root of b squared minus 4ac all divided by 2a. This formula only works with trinomials and second degree equaitons. If the equation is a binomial, then put in a placeholer (0) and substitute them into the equation.

First you factorise it. Then you cancel out the common terms.

A quadratic function is ax2+bx+c You can solve for x by using the quadratic formula, which, as the formula requires the use of square roots, would be tricky to put here.