Whats the positive and negative points of f(x)= -2x^2+4

Ess asked Jul 5, 2022

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Ess asked Jul 5, 2022

by Ess

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12 votes

Answer:

positive point:
(0,√(2))

negative points:
(0,-√(2)) .

Explanation:

Factorize the given expression.

$f(x)=-2x^2+4\\f(x)=-2(x^2-2)\\f(x)=-2(x-\sqrt2)(x+√(2))$

Set the function equals to zero.

$-2(x-\sqrt2)(x+√(2))=0\\x=√(2), -√(2)$

So, the positive point is
(0,√(2)) and negative points is
(0,-√(2)) .

GraphicalDot answered Jul 11, 2022

2.6k points

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