Question

Solve by graphing. x2 2x - 8 = 0
a. –2, 4
b. 2, –4
c. 2, –4
d. –2, 4

Answer 1

well, to solve, garph the equation y=x^2+2x-8 and y=0
see where they intersect

anyway the easier way is to factor but anyway
0=(x-4)(x+2)


anyway

solution is x=4 and -2

A and D are answers (they are same)

Answer 2

Option B and C are same, which are the correct answers.

Explanation:

The given graph shows the plot for x²+2x-8=0

Here the graph crosses the x axis at points -4 and 2.

So the roots of the equations are -4 and 2

Option B and C are same, which are the correct answers.