Start by identifying the values of a, b, and c. Be sure that all of the terms of are on the same side and in the correct order for the standard form of a quadratic function.
10
Practice makes perfect
To solve the given equation by factoring, we will start by identifying the values of a, b, and c.
4x^2=80x-400 ⇔ 4x^2 - 80x+ 400=0
Notice that this equation follows a special pattern. It can be factored as a perfect square trinomial.
We found that the solution to the given equation is x=10. To check our answer, we will graph the related functions y=4x^2-80x+400 and y=4(x-10)^2 in the same coordinate plane using a graphing calculator.
We see that only one graph appears. This means that both graphs coincide. We can see that the x-intercept is 10. Therefore, our solution is correct. âś“
