SOLUTION: a-solve 4x^2-8 b-find the x intercepts of f(X)=4x^2-8 a- what are the solutions b-what are the x intercepts

Question 464981: a-solve 4x^2-8
b-find the x intercepts of f(X)=4x^2-8
a- what are the solutions
b-what are the x intercepts
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
4x2-8=0
4x2=8
x2=2
x=√2,-√2

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=128 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 1.4142135623731, -1.4142135623731. Here's your graph:

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