Question

graphical solution of x square minus x minus 2 plz give answer plz​

Answer 1

Solve the equation

x2−3x−10=0

x2−3x−10=0

Graph the equation. This could either be done by making a table of values as we have done in previous sections or by computer or a graphing calculator.

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The parabola cross the x-axis at x = -2 and x = 5. These are the roots of the quadratic equation.

We can compare this solution to the one we would get if we were to solve the quadratic equation by factoring as we've done earlier.

x2−3x−10=0

x2−3x−10=0

(x+2)(x−5)=0

(x+2)(x−5)=0

x=−2orx=5

x=−2orx=5

A quadratic equation has two roots if its graph has two x-intercepts

A quadratic equation has one root it its graph has one x-intercept

A quadratic equation has no real solutions if its graph has no x-intercepts.

HOPE IT'S HELPFUL