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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
To solve the equation x^2 + 4x = 5, we first need to rewrite it in standard form by combining like terms: x^2 + 4x - 5 = 0. Next, we can solve for x by factoring the quadratic equation or using the quadratic formula. Factoring may involve trial and error or the use of the AC method. Alternatively, the quadratic formula, x = (-b ± √(b^2 - 4ac)) / 2a, can be used where a = 1, b = 4, and c = -5 in this case.
It is x^2 - 20x + 100 = 0.
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.
Unfortunately, the equal sign gets lost in the title. Anyway, you can solve this type of equation using the quadratic formula.
Using the quadratic equation formula: x = 8.42 or x = -1.42
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.
With great difficulty because it is not a quadratic equation or even a quadratic expression.