SOLUTION: Find the zero of the function. Give approximate solutions rounded to three decimal place when necessary. f(x)=5x^2+6x-7 the answer is -1.927, 0.727

Question 922463: Find the zero of the function. Give approximate solutions rounded to three decimal place when necessary.
f(x)=5x^2+6x-7
the answer is -1.927, 0.727
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=176 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 0.72664991614216, -1.92664991614216. Here's your graph:

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