Draw the graph of y=x2- 2x - 3 and find zeroes. What do
you notice with graph and verification and observations
Answers
Answered by
33
EXPLANATION.
Graph of the quadratic equation.
⇒ y = x² - 2x - 3.
As we know that,
Factorizes the equation into middle term splits, we get.
⇒ y = x² - 3x + x - 3.
⇒ y = x(x - 3) + 1(x - 3).
⇒ y = (x + 1)(x - 3).
Zeroes of the equation,
⇒ (x + 1)(x - 3) = 0.
⇒ x = -1 and x = 3.
⇒ y = x² - 2x - 3.
Put the value of x = -1 in equation, we get.
⇒ y = (-1)² - 2(-1) - 3.
⇒ y = 1 + 2 - 3.
⇒ y = 3 - 3.
y = 0.
Their Co-ordinates = (-1,0).
Put the value of x =- 3 in equation, we get.
⇒ y = (3)² - 2(3) - 3.
⇒ y = 9 - 6 - 3.
⇒ y = 9 - 9.
⇒ y = 0.
Their Co-ordinates = (3,0).
Put the value of x = 0 in equation, we get.
⇒ y = (0)² - 2(0) - 3.
⇒ y = - 3.
Their Co-ordinates = (0,-3).
Attachments:
Answered by
0
Answer:
Step-by-step explanation:
the guy up there is right mmmmmhhhh
Similar questions