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erica [24]
3 years ago
10

If x = -4, calculate 2x squared - 5

Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
5 0
You just substitute the value of x in the given equation:


f(x) = 2x^2 - 5

f(-4) = 2 (-4)^2 -5 = 27

f(x) : a name given to the equation
f(-4): refer to the equation when the value of the independent variable x has the value between the brackets.
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Black_prince [1.1K]

Answer: x=7

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

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(2)(6x)+(2)(5)=94(Distribute)

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Step 2: Subtract 10 from both sides.

12x+10−10=94−10

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Step 3: Divide both sides by 12.

12x

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