Question

If Y=2X^2-4X-5, what is the value of Y when X = -3?

Answer 1

y = 2x² - 4x - 5

substitute  x = -3 to the equation

y = 2 · (-3)² - 4 · (-3) - 5 = 2 · 9 + 12 - 5 = 18 + 12 - 5 = 30 - 5 = 25


Answer: y = 25

Answer 2

The value of the quadratic equation, y = 2x² – 4x – 5 at x = –3, will be 25.

What is a quadratic equation?

The quadratic equation is given as ax² + bx + c = 0. Then the degree of the equation will be 2. Then we have

The quadratic equation is given below.

y = 2x² – 4x – 5

At x = -3, then the value of y will be

y = 2(–3)² – 4(–3) – 5

y = 18 + 12 – 5

y = 25

More about the quadratic equation link is given below.

https://brainly.com/question/2263981

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